Download - Guinea Pig Dissertation
History of guinea pig
ORIGIN OF THE GUINEA PIG :
Guinea-pig
Guinea pig is in Guinness Book of Recordes there is a 15 year old guinea pig.
Guinea-pig
A person or animal who is used as the subject of an experiment.
Origin
Guinea pig is in Guinness Book of Recordes there is a 15 year old guinea pig.
It isn't at all clear why these cute family pets came to be given their name. They
are cavies, not pigs, and they don't originate from Guinea. Both 'guinea' and 'pig'
seem to stem from simple, but mistaken, associations. The name 'guinea pig'
dates from the 17th century and the first record of it is in Henry Power's
Experimental Philosophy, 1664:
"You may see them... like so many Ginny-Pigs, munching and chewing the cud."
The 'guinea' part of the name is perplexing. It was certainly a reference to a place
rather than to the idea that the animals cost a guinea to buy, as is sometimes
wrongly suggested. Guinea is in fact in East Africa but the little rodents, properly
called Cavia Cobaya, are from the Andean region of South America. It could be
that the name derives from the 'Guineamen', which were sailing ships that
followed a route from the UK to Africa and then on to the Americas, plying the
slave trade. It could also be that the distinction between West Africa and South
America wasn't as clear as it is now. 'Guinea' may have just been a synonym for
'somewhere a long way across the sea'.
'Pig' is a little easier to understand. look Cavies do at least somewhat like tiny pigs
and that was in the mind of the academics who first gave them a Latin name -
Cavia porcellus, porcellus meaning 'little pig'. This is in line with the habit at the
time of naming any small and vaguely porcine creatures as 'pigs'. George
Gascoigne's translation of Noble Arte Venerie, 1575 does that for baby badgers:
"There are Foxes and theyr Cubbes, and Badgerdes and theyr Pigges."
The same loose associations were no doubt at work when the animal was called
the Spanish Coney in a 1710 edition of The British Apollo: Containing Two
Thousand Answers to Curious Questions in Arts and Sciences:
"A Guinea Pig... in Johnston's Natural History goes by the Name of a Spanish
Coney."
Coney was the old name for rabbit so, instead of a pig from Guinea we have a
rabbit from Spain.
The first use of the term 'guinea pig' to describe a person didn't have the current
'subject of an experiment' meaning, but was a name for inexperienced
midshipmen on the sailing ships mentioned above, as recorded in The Adventures
of a Kidnapped Orphan, 1747:
"He sent his nephew, at the age of fourteen, on a voyage as a Guinea-pig."
It wasn't until the 20th century that the expression was given its current meaning.
This was first alluded to by George Bernard Shaw, in Quintessence of Ibsenism
Now Completed, 1913:
"The... folly which sees in the child nothing more than the vivisector sees in a
guinea pig: something to experiment on with a view to rearranging the world."
Shaw, who was a noted vegetarian and what would now be called an animal
liberationist, was referring to the practice of using guinea pigs in scientific
experiments. This had been going for some time by 1913. The celebrated French
chemist Antoine Lavoisier used a guinea pig in an experiment on respiration in
1780.
Why guinea pigs were chosen as subjects of experimentation isn't entirely clear.
They may not have cost the huge price of a guinea but, being imported from
'Guinea', they were more expensive than mice and rats, which have now largely, if
doubtless reluctantly, taken their place.
EVOLUTION OF GUINEA PIG :
guinea pigs evolution in the wild
Guinea Pigs evolved in a grassy plain habitat and
evolved to avoid predators (so they are prey animals,
not attackers). They ate, reproduced, and coped with
the elements on the grassy plain. They evolved many
adaptations to achieve these goals.
Cavies are social animals, preferring to live in herds.
This adaptation provides more eyes, ears and noses to sense the approach of
danger and to sound the alarm so that others can rest. This way, no one animal
becomes exhausted by sentry duty. Also, when many animals flee together, it
forms a confusing jumble of shapes, and a predator has a harder time focusing on
a single individual to catch. In herds, young guinea pigs are better protected than
if they were off by themselves.
Guinea pig babies are born fully covered with hair, their eyes are open, and they
are able to stand and run shortly after birth. This is because they must be able to
stay with the herd in order to be safe. Guinea pigs use flight to avoid predators,
Guinea pigs are small and live down in the grasses. They combine flight with out-
maneuvering their enemies and taking cover. They are fast, agile and can turn
without pause through memorized tracks of grass tunnels and along all the ups
and downs of the terrain. They can wedge themselves into tiny cracks and
crevices where they hide until it is safe to come out. At times, guinea pigs may
lunge at a predator to hold off an attack but, even so, guinea pigs remain
vulnerable. As Guinea Pigs have a short life span they must make up for this by
being capable of reproducing at an astounding rate, which they do.
Guinea pigs have incisors for clipping mouthfuls of vegetation and molars for
grinding, with a gap in between. The food that they eat is hard and coarse, which
wears down their teeth. To compensate cavy teeth constantly grow. Cavies are
best adapted to food that is highly fibrous and of relatively low nutritional value
(grass hay). Guinea Pigs, therefore, have a large calcium to help digest their food
arid can pass large amounts of partially digested food through their systems in
order to get what they can from it and then move on to the next mouthful.
Guinea pigs eat their own droppings for beneficial vitamins.
An animal must manage its body temperature. A great deal of heat is lost through
the skin. Two animals of the same shape but of different sizes will lose heat at
different rates. The smaller one will lose heat more rapidly. This is because, shape
being equal, the smaller animal has a larger surface-to-volume ratio. Since a
sphere has the smallest surface-to-volume ratio of any other shape, small animals
such as guinea pigs can reduce heat loss by having a more spherical body. Could
guinea pigs have lost their tails in order to be more compact and to lose less heat?
Another way for an animal to stay warm is to have a higher metabolic rate. A
guinea pig has a fast heartbeat and eats more in relation to its weight.
HISTORY OF GUINEA PIG :
Guinea pigs originated from South America where several different species can
still be found. The ancestor of the domesticated guinea pig is thought to be the
restless cavy, Cavia cutleri. The restless cavy lives in big family groups in the long
grass, being protected from preditors by overhanging stems. They don't burrow
for themselves but instead use abandoned burrows from other animals.
They can be attacked by meat-eating enemies so they are shy and get scared very
quickly. Young cavies are not born in the safety of a burrow but out in the open.
They are born fully furred with their eyes open and within two days after being
born they are eating the same food as their parents.
Before the Spanish conquest of South America in the 16th century, the Incas kept
them for food and even today the Peruvians breed them for their meat. Sailors,
who were probably the first people to do so, kept them as pets and brought them
to Europe from South America. Many people believe that is how they got their
name the 'guinea pig', because the sailors sold them for one guinea and they
make squeaking noises like a pig.
SOCIAL ROLE :
Guinea pigs - we're all familiar with this small rodent. We know what they look
like and what they're used for. They're cute little rodents and they are pets. As far
as most of us in the western world are concerned, that's the complete story. But
there is much more to the tale of this cute little animal's history and its
contribution to human society across the globe.
In the United States and Europe these little pigs have become popular pets.
Known and revered for their docile and friendly nature and for their cute
demeanor, guinea pigs are adored by children and adults alike in the west. They
have become the family pet of choice in thousands of households. They are
relatively easy to care for and inexpensive to own. They are generally good
natured and rarely bite.
Guinea pigs live an average of about five years and may even live to seven years.
They are best kept indoors in a temperature-controlled environment. They do
best in a standard "room temperature" setting (65 to 75 degrees).
In addition, serious cavy breeders raise these animals as show animals. These
show animals are exhibited in sanctioned events across the nation. The American
Rabbit Breeders Association is the official registry for cavies in the United States.
Unfortunately, the common usage of the "guinea pig" label in our English
language is derived from one of our poor cavy's more unpleasant roles - that of
the laboratory test subject. They were used extensively in the 1800's and 1900's
as research test animals. So much so that the name guinea pig gradually became
a popular idiom denoting a test or sacrificial subject. Fortunately for the cavy, this
usage is decreasing as laboratories turn increasingly more to other rodents - most
notably rats and mice.
In South America, the story is very much different and bleaker for our furry little
friend. The cavy has a completely different history in this area of the world. The
guinea pig originated in South America. Today there are no guinea pigs left in the
wild. However, in years past when they did live in the wild - South America was
their stomping ground. The originally came from in the Andean region of South
America. Nowadays this region is made up of modern day Bolivia, Ecuador and
Peru.
The Inca Indians domesticated this little beast around 5000 B.C. and raised it for
food. Because of this unfortunate precedent, the cavy is still eaten today in this
region of the world. In small Indian villages, people still raise the little rodent for
food just as western farmers raise and eat barnyard animals.
Yes, we think of the cavy as only a pet - as a companion for our children and for
us. But this creature has other roles - some familiar and some extremely foreign
to us. They are raised and sold by breeders to be used as show animals. Some
guinea pigs are specially bred and sold to research companies to be used as
laboratory test subjects. And in South America, they are a food source. We should
be grateful for the guinea pig. Over the years, this seemingly insignificant little
rodent has contributed to the human race in many ways.
General Care to be taken
Guinea pigs’ teeth grow continuously, just like those of all other rodents. So, it is
important for you to give your guinea pig a piece of wood that he or she can gnaw
on to wear his or her teeth down. It’s best to provide a tree branch that has not
been treated with pesticides or any other chemicals, but any small piece of
unpainted wood that hasn’t been treated with chemicals will do.
Guinea pigs are very conscientious about grooming themselves, but brushing
them on a regular basis will help keep their coat clean and remove any loose
hairs. Long-haired guinea pigs should be brushed daily in order to prevent tangles
and knots from forming.
Guinea pigs are social animals who prefer to live in small groups. If necessary, two
young males generally can be kept together, but fighting usually breaks out
among adult males. Several females can be kept together without problems,
however. Since guinea pigs, like all rodents, multiply rapidly, keeping males and
females together is not recommended.
Breeds of guinea pig /type avilable
TYPES OF BREEDS :
There are 13 recognized breeds of guinea pigs (cavies) in the United States. The
breed standards are developed by the American Rabbit Breeders Association.
Abyssinian
The Abyssinian (Aby, or Abby) is one of the oldest breeds of
guinea pigs. It is recognized by the symmetrical rosette (hair
radiating symmetrically from a center) and erect ridge patterns
on its body and head. The number of rosettes can vary, but to be shown, an Abby
must have at least eight (10 are preferred), and they must be clearly defined. The
Abyssinian also has a mustache of raised fur around its nose. The fur is coarse and
is found in a multiple of colors and color combinations.
Abyssinian Satin
The Abyssinian Satin has the same appearance as an
Abyssinian, but with a satin sheen to the fur. Like the
Abyssinian, it must have a pattern of rosettes and ridges, and
possess a minimum of 8 rosettes in order to be shown.
American
The American, sometimes referred to as the "English" cavy, is
the most common breed of guinea pig, as well as one of the
oldest. The hair is short, smooth, straight, and sleek. It is found
in a wide variety of colors and color combinations and has a
Roman nose (wide and curving). Its body is medium length, and of about the same
circumference from the shoulder back to the hip.
American Satin
The American Satin has the same appearance as the American, but the coat is
fine, dense, and soft, with a glossy sheen, and feels like satin to the touch.
Coronet
The Coronet is a longhaired breed with a single rosette on the
top of the head. The hair from the rosette to the rump is long,
without a part. It has a Roman nose.
Peruvian
The Peruvian was the first recognized longhaired breed. It is
noted for the long, dense, soft "sweeps" of hair that can grow
to over a foot in length. The hair on the head grows forward,
covering the head, and giving the animal an even, circular
appearance when viewed from above. Show Peruvians need
regular grooming and the hair is often wrapped to keep it from
becoming soiled or tangled. Because of the amount of time and effort needed to
groom a Peruvian, this breed is not recommended for a pet, although some
owners may trim the hair for easier care.
Peruvian Satin
The Peruvian Satin has the same appearance as the Peruvian, but the coat has a
glossy sheen, and feels like satin to the touch.
Silkie
The Silkie, called the "Sheltie" in England, was originally called
the "Angora." It is a longhaired breed, but unlike the Peruvian,
there is no long, frontal sweep of hair that covers the face.
Instead, the hair sweeps back from the head forming a mane,
and there is no part down the back. When viewed from above, the Silkie appears
tear-shaped. The hair is softer, finer, and tends to be shinier than the Peruvian. As
with the Peruvian, the coat needs daily grooming and the hair is wrapped to keep
it clean and tangle free.
Silkie Satin
The Silkie Satin has the same general appearance as the Silkie, but the coat has a
glossy sheen, and feels like satin to the touch.
Teddy
The Teddy has a short, wiry, dense coat. The hairs, and even
the whiskers, are kinked. The coat is resilient, meaning it
returns to its original position after being disturbed. The body
of the Teddy is similar to the American in length, and it has a Roman nose.
Teddy Satin
The Teddy Satin has the same general appearance as the
Teddy, but the coat has a glossy sheen.
Texel
The Texel has long, thick, soft hair that forms ringlets or curls
over the entire body, even the belly. The body is short and
compact, and the head is broad and well-rounded. Because the
hair is both long and curly, this breed is one of the most
difficult to keep well groomed.
White Crested
The White Crested has a short, smooth coat with a distinctive
white, circular rosette on the top of its forehead. Except for the
crest, there should be no other white spots on the animal.
There are many color varieties, but cannot include Dalmatian, Himalayan, Dutch,
Roan, or Tortoiseshell and White, or other varieties which have white hair
elsewhere on the body.
Other color varieties
In addition to breeds, there are many color varieties of guinea pigs. The
recognized colors include:
Self: Solid color; colors include black, white, red, beige, chocolate, cream,
lilac, and blue
Dutch: Colored head with white blaze; front half of the
body white and rear half of the body same color as the
head
Brindle: Intermingling of two colors; one dark and one light color,
appearing consistently over the body
Tortoiseshell: Well-defined rectangular patches of black and red, similar in
size and distributed evenly and uniformly over the body without running
together
Tortoiseshell & white: Well-defined rectangular patches
of black, red, and white, similar in size; the dividing line
between the patches should run down the middle of the
back and across the middle of the belly with colors
alternating on each side of the division
Roan: Darker hairs (e.g., black or red) intermixed evenly with white hairs
Agouti: Alternate dark and light bands of color on each
hair; colors include silver and golden
Albino: Pure white with pink eyes
Dalmatian: White body with dark spots
Himalayan: White body with brown or black nose, ears,
and feet; red eyes
In addition, there are various other combinations of two or
more colors. For instance, a collared variety exists, which has a
different color of hair around the neck.
Where can we find them?
Guinea pigs live in the wild in South America, living in rocky areas, grasslands and
forest edges. They live in groups of about 10 adults, and live in burrows, either
dug by themselves or by other animals. They are most active at night, when they
come out and forage on a wide variety of plant materials.
The guinea pig was first domesticated as long ago as 2000BC in the Andes in
South America, in the region now known as Peru and Bolivia. They were originally
kept for food, but some may have become family pets for the children at that
time. Guinea pigs were not often bought; rather they were given as presents,
especially as wedding gifts, or as gifts to special guests or children! They would be
kept in the household kitchen, where they would be allowed to run around freely.
At this time the guinea pig also played the role of the evil spirit collector in
traditional healing rituals. In Andean medicine the guinea pig was rubbed over the
body of a sick patient, and when it started squeaking they believed it had
identified the affected area! Black guinea pigs were considered especially holy, as
in the wild black is the rarest colour, most wild guinea pigs are brown or grey,
similar to the agouti colour we see today.
In the 1700s Dutch and English traders brought guinea pigs over from South
America to Europe, where they became popular pets for the aristocracy. It is
possible that on the journey over to Europe that they did stop at Guinea, leading
people to believe that was where they came from. Queen Elizabeth 1 owned a pet
guinea pig, which probably accounted for their popularity as pets from that time.
Guinea pigs are now extremely popular pets. They are very friendly and have no
tendency to bite or scratch (if you do get nipped by mistake it is probably because
they mistook your finger for a carrot!). They are also very hardy, and if cared for
properly they have very few health problems.
How to differentate between male and female
Difference between male and female guinea pig
As guinea pigs are capable of breeding at such a young age (3-4 weeks old) it is
very important to make sure you've got the right sexes from the beginning. A
female has a little triangle or v at the front of her anogenital opening, whereas a
male has a circle with a cross on it (like a hot cross bun).
Differentiate between the breeds of guinea pigs on the
based on their markings
Different Coat types of guinea pigs
Now that we have covered most of the commoner colour and markings of guinea
pigs the other important factor in determining guinea pig type is the coat type.
Again, there are a number of varieties of hair types of guinea pig and most come
in many of the colours outlined above. A brief outline of the commonest hair
types of guinea pigs is given below.
Smooth-haired guinea pigs
Smooth coated guinea pigs are also known as "normal
coated" because this is the original hair type and these are the commonest type.
The short hair in these guinea pigs is about 30 mm long and lies smoothly against
the skin. There is a soft undercoat and the outer layers are coarser. The coat
should have a definite gleam.
The advantages of the smooth coated guinea pigs are that they require virtually
no special coat care and they are particularly good for showing colour patterns as
sharply defined in a smooth coat.
Satin coated guinea pigs
Satin coated guinea pigs are similar to smooth coated but the coat is softer and
has a deep lustre which gives more depth and warmth to the colours. These coats
are dense and are again about 30 mm long and lie sleekly against the body with
relatively little undercoats.
Crowned and crested guinea pigs
Crowned or crested guinea pigs have a "crown" of hair
on top of the head which is a circular arrangement of hair laying outwards from a
centre point. There are different varieties of crested guinea pigs including English
where the crown is the same colour as the rest of the coat and American where
the crown is white.
Their coats are otherwise similar to a smooth coated guinea pigs and the crest is
dominant in breeding which means if a crested guinea pig is mated with a non-
crested the offspring will be crested.
Abyssinian guinea pigs
Abyssinian guinea pigs were originally bred in Britain
and they are the second most popular type after smooth coated. Abyssinian
guinea pigs are defined by the symmetrical rosettes in their coats where the hair
radiates out from a central point. They should have at least eight of these and
they also have erect ridge patterns of hair over their bodies and head.
Abyssinian guinea pigs also have a "moustache" of raised fur over their nose and
the fur is coarse in texture. They can be found in a number of colours and marking
combinations.
Rex-coated guinea pigs
Rex coated guinea pigs are a fairly new type and their coat type is caused by a
recessive gene which causes curly hair which is coarse in texture and does not lie
smooth against the body but stands upright from the body. The hair should be
dense and feel springy to the touch. The hair on the head is usually considerable
shorter than on the rest of the body. Rex coated guinea pigs have been bred in
most colours and also crossed with other hair types such as satin.
Long-haired guinea pigs
Long haired guinea pigs require special care and
attention to their coats compared with the short haired breeds such as regular
grooming and trimming. Their hair can become tangled and soiled at the rear and
it also has implications for the type of bedding that you use for them, as some
types of bedding can get caught up in their coats. Long haired guinea pigs should
therefore not be obtained without considering all of the implications and special
requirements.
Peruvian: Peruvian long haired guinea pigs have a rosette on their heads which
causes the hair to fall forwards over their noses. The coat is generally soft and
shiny. There is no standard to define the length of their hair.
Peruvian guinea pigs come in a variety of colours and markings and have also
been crossed with other hair types.
Sheltie: Sheltie guinea pigs look very similar to Peruvian but with one important
difference, they do not have the rosette on their head. This means that the hair
grows backwards instead of falling across the face.
Shelties have a type of "beard" of long hair off the cheeks and a well developed
train of hair flowing from the rear.
Texel: Texel guinea pigs were first bred in Britain and are really a form of long
haired rex guinea pig. They have long wavey hair that is soft to touch and should
have a parting in the middle of its back. The hair on the underside forms small
curls and there should be a well developed train of hair flowing from the back.
Texel guinea pigs have been bred in a number of colours an crossed with other
coat types but they are not a recognised breed in some countries.
Biology of guinea pig
Lifespan of guinea pig:
Life Span
A guinea pig's life span is much longer than most other small pets, and they will
provide you with years of joy, provided you can fulfil their needs.
The average guinea pig life span is around 4-6 years, although some can live as
long as 8 years. This is much longer than most other small pets, including other
rodents such as mice (1-3 years), gerbils (2-4 years), and hamsters (2-3 years).
Your guinea pigs' life span will depend on a number of factors, such as how well
they are cared for, their diet, and whether they suffer from any serious illnesses
during their life. Having said that, there is only so much you can do to lengthen
your cavy's lifespan, and even the most well cared for pet may die young through
no fault of the owners. The best advice is to enjoy every minute you have with
your pet, so that you have many happy memories to look back on after they pass
away.
Guinea pigs live longer than many small pets, at up to 6 years.
Commitment
Because guinea pigs live for so long, you should take this into account when
deciding whether they are the right pet for you. Remember that you will need to
feed them and give them water every single day during that time, and you will
also have to play with them and clean out their cage frequently. If this sounds like
too much of a commitment then you might be best off considering another
animal which does not live so long, and which will place less demands on your
time.
Children
If you are thinking about buying guinea pigs for your children, you need to think
about whether they will still want to care for them 1, 2, or 5 years down the line.
Young children in particular can be very fickle, and you may soon find that they
lose interest in their cavies, leaving you with the responsibility of looking after
them.
Size and measurement
Size
Guinea pigs are much bigger than other pet rodents, but what is a 'normal' size?
Compare your guinea pig's size to the average at different ages.
Guinea pigs are somewhat unusual among pet rodents because they grow much
bigger than their furry cousins such as mice, rats, and hamsters. So what is
considered a 'typical' or 'normal' size for a guinea pig? The following figures
should give you a rough idea of how long your cavy should be at various stages in
its life.
Guinea Pig Size Chart
For convenience, the following table summarizes these figures:
Age Size
Birth 8-10 cm (3-4 inches)
8 Weeks 15-20 cm (6-8 inches)
16 weeks 20-25 cm (8-10 inches)
14 months 20-30 cm (8-12 inches)
Measuring
To measure the size of your guinea pig, place it on a flat surface and place a ruler
or tape measure next to it, running parallel to its body. Measurements should be
taken from the tip of your pet's nose to its rear. Don't worry if your cavy moves
around a lot and makes it difficult for you to get an exact measurement - a rough
idea is more than sufficient.
Size as an Indicator of Age
If you buy your guinea pigs from a pet store, it isn't uncommon for them to be a
little unsure about the age of the animals they stock. In these cases, it is
extremely helpful to be able to use your knowledge of guinea pig sizes to estimate
their true age. Among other things, this can help you avoid buying a pet which is
really too young to be sold.
Colors and markings
Colors
The above breeds can come in a variety of colors, but what does that
mean? Color refers to the actual color of the fur rather than the fur type,
fur patterns, or any other distinguishing characteristics like rosettes or
ridges.
There are ten basic colors of guinea pigs, though there are many
variations that include two or more of these basic colors. The basic colors
are:
Self
A solid color
Dutch
Colored head, white blaze, front half of body white, head
and hind end same color.
Brindle
One dark color and one white color intermingled
consistently over entire body.
Tortiseshell
Well-defined black and red rectangular patches of color
even and uniform across entire body.
Tortiseshell&White
Well-defined black, red, and white rectangular patches
of color, divided along a line that runs down the middle
of the back and belly.
Roan
White and darker hairs mixed evenly over entire body.
Agouti
Each hair has alternate dark and light bands of color.
Albino
Pure white, no dark hairs at all, pink eyes (complete lack
of pigmentation).
Dalmation
White body, dark spots.
Himalayan
White body, brown or black nose, ears, and feet, red
eyes.
Markings
Guinea pigs have been bred with a variety of different colour patterns and
markings and these have presented quite a challenge to guinea pig breeders as
often the markings do not breed true so the results can be quite unpredictable.
There are a vast amount of different colour patterned guinea pigs but here we
give a brief outline of the commonest.
Brindle: These have a mixture of red and black hairs in their coats and show
judges prefer to see an even mix and distribution of the two colours. Patches of
one colour are regarded as a "fault" as are white patches and the ears and pads
should be black with dark eyes.
Tortoiseshell: These are a mixture of red and black where the border between the
two is very sharp and clearly defined and outlining more or less rectangular areas.
Ideally tortoiseshell guinea pigs should have three to five patches on each side
and should divide in a straight line down their back.
Tri-coloured: These guinea pigs are tortoiseshell with the addition of white. These
come as black, red, white or chocolate, red and white varieties.
Dutch: Dutch coloured guinea pigs are similar to dutch rabbits, that is they are
white at the front and have a coloured rear. They usually also have two or three
patches of the colour on the head or ears. Ideally these patches should be
symmetrical. Again the divide along the back of one side from the other should be
as straight as possible. The coloured parts of the body can be any colour but the
commonest colour is black and the feet and legs are usually white.
Roan: Roan guinea pigs have a mixture of white hairs with other colours including
black or red. Show judges prefer the white hairs to be evenly distributed rather
than in too obvious clumps or patches.
Dalmatian: Just like the dogs dalmatian guinea pigs are white with dark spots
which should be evenly distributed around the body and sharply defined rather
than merging in to each other. This pattern is still not recognised in many
countries.
True breeding colour point: These have a white body with dark markings on the
nose, ears and usually feet being black or chocolate. They are similar to Siamese
cats and himalayan rabbits.
Reproduction and development
Guinea Pig Reproduction
The single most important breeding consideration is that female guinea pigs
should be first bread before 7 months of age. If the first breeding is
delayed beyond this time, serious (sometimes life-threatening) problems with
delivery are encountered. Females should be first bread between 3 and 7 months
of age. Males should be 34 months old at their first breeding. The guinea pig's
heatcycle lasts 16 days. The period during which the female is receptive to the
male and will allow breeding lasts about 8 hours. Female guinea pigs can come
back into heat 15 hours after giving birth. This is called a "postpartum estrus,"
which means that they can be nursing a litter and pregnant at the same time!
Pregnancy lasts an average of 63 days. The larger the litter, the shorter the term
of pregnancy and vice versa. The duration of pregnancy for guinea pigs is
unusually long when compared with that of other rodents. Pregnant sows
(females) exhibit a grossly enlarged abdomen during the latter stages of
pregnancy. It is not uncommon for their body weight to double during pregnancy.
The time of delivery may be difficult to determine because of the relatively long
gestation period and because pregnant sows do not build nests. However, the
week before a sow is about to deliver a litter, a slowly widening separation of the
pelvis develops just in front of the external genitalia. This separation reaches
slightly more than 1 inch in the hours just before delivery. This separation of the
pelvis does not develop in females that are bred for the first time after 7 months
of age, creating an impossible and tragic situation. Delivery of the young is not
possible and a cesarean section must usually be performed to save the life of the
sow and her babies. An uncomplicated delivery usually requires about 1/2 hour,
with an average of 5 minutes between delivery of each baby. Litter sizes range
from 1 to 6 young, with an average of 34. Litters resulting from the first breeding
are usually very small. Abortions and stillbirths are common with guinea pigs
throughout their breeding lives.
The young are born relatively mature. They are unusually large and fully furred,
and can walk about. They also have teeth and open eyes at this time. Even
though newborn guinea pigs can eat solid food and drink water from a container,
they should be allowed to nurse their mother for at least 2 weeks.
Difficulties During Birth
Dystocia: Female guinea pigs intended for breeding must be first bred before 7
months of age. If the first breeding is delayed beyond this time, serious
(sometimes life-threatening) problems with delivery are encountered. A portion
of the pregnant sow's pelvis must widen for successful delivery of her young. This
separation fails to develop in females bred for the first time after 7 months of
age, usually necessitating a cesarean section to deliver the young and save the
sow's life. Signs of dystocia include straining and uterine bleeding. Veterinary help
must be sought immediately. The veterinarian will evaluate the pregnant sow by
direct exam and by taking x-rays. If a vaginal delivery of the young is not possible,
a cesarean section will be necessary.
Pregnancy Toxemia is a serious condition that usually occurs in overweight sows
in their first or second pregnancy. Signs are most likely to be noted over 1-5 days
during the last 2 weeks of pregnancy or the first week following birth. These
include inappetence, depression, weakness, reluctance to move, incoordination,
difficulty breathing, coma and death. Some afflicted sows may show no signs and
suddenly die. There is no single cause for this condition, but stress and obesity are
major predisposing factors. Others include advancing age, lack of exercise, fasting
just before the onset of signs, and a large number of developing fetuses. The
fundamental underlying problem appears to be inadequate blood flow to the
pregnant uterus. Sows showing any of these signs must be seen immediately by a
veterinarian. Because treatment is often unsuccessful, prevention of pregnancy
toxemia is of paramount importance. Pregnant sows should not be allowed to
become obese. Fasting and stress must be avoided, especially in the last several
weeks of pregnancy. Pregnant sows must be supplied with fresh water at all times
and fed a nutritious diet.
Breeding If you do intend to breed, the timing for the female is very important.
The earliest age is 5 months, and she should be bred from before she is 10 months
old. This is because after this age the bones in her pelvis fuse, and make it more
likely that she will have problems delivering her babies. If she has a litter before 10
months of age her pelvis will stretch to allow for childbirth, and she shouldn't have
problems with any further litters when she is older.
Babies
Because guinea pigs carry their young for such a long time (68-70 days) they are
born at a very advanced state of development. Within hours they are running
around fully furred and with their eyes open, little miniatures of their parents. An
experienced guinea pig keeper will able to be able to sex them immediately, but
do make sure you find out what they are before they are 3 weeks old.
Development of guinea pig
Lifespan: (maximum) 12 years, (average) 5 years.
Sexual maturity: 4-6 weeks
Estrous cycle: 15-17 days
Gestation period: 67-69 days
Average litter size: 3 pups (range 1 - 4)
Weaning age: 3 weeks
Understanding Your Guinea Pig
Having spent many years being in the company of guinea pigs, I feel they can be
underrated by people who have never lived with a guinea pig. They don't just sit
in their cage, eating all day long, although eating does take up quite a bit of their
time, guinea pigs are intelligent little animals. Every guinea pig has a unique
personality. They soon learn who they can trust and they recognize their owners.
Guinea pigs also recognise the sound of their name and their owners voice. I
remember my elder brother being amazed that my guinea pigs came running up
to me when I called out their name individually. Every time my guinea pigs come
running up to me, I still get an overwhelming sense of pride that my piggies really
trust me. Guinea pigs can understand little requests. When out playing, I can ask
my piggies to 'go to the corner' which to them, means they are going to be lifted
and put back in the cage. Squeekie, Peachy and Clover who are cage mates will
especially take notice of this request. I'm still working on Sweetpea, Jasmine and
Jake. Apart from Jasmine, Jake and Sweetpea will sit still when I say 'come on
Sweetpea' or 'come on Jake', they know its time to go back in the cage. Jasmine
however, doesn't enjoy being lifted at all and we end up having this little game,
where mum has to guess if Jasmine is going to go into reverse or move forward :)
Guinea pigs respond well to an owner that is gentle, caring and who doesn't raise
their voice. I'm sure they like 'baby' talk' too, as Peachy, Sweetpea and Squeekie
seem to purr even more and my other 3 guinea pigs will stretch out looking more
relaxed. So don't worry what other members of your family think when you start
talking to your guinea pigs. I see my guinea pigs as little babies who totally
depend on me for their welfare and like human babies, they respond well to a
gentle voice.
Checkings to be made for a guinea pig if it
is feeling uneasy
Thankfully, guinea pigs are very hardy creatures, and if kept clean and fed well
they rarely become sick. There are, however, some daily checks you should make,
to ensure that your guinea pig stays well, it also helps you to notice any change
very quickly, and visit your vet at the first sign of illness.
Eyes
The eyes should be clear and bright, with no sign of cloudiness or discharge. An
eye that suddenly goes cloudy may mean that the guinea pig has got an ulcer as a
result of a piece of hay in its eye. Any eye problems require urgent veterinary
attention. Guinea pigs do normally secrete a milky discharge from their eyes,
which precedes grooming, as they use it on their paws to groom themselves, if you
see this you do not need to worry about it.
Nose The nose should be clean, and as with the eyes, shouldn't be runny. Any discharge
or sneezing may suggest that your guinea pig has a cold.
The coat The fur should be dense and clean. Any patches of hair loss or areas where the skin
is red and sore may suggest that your guinea pig has mites. Watch him closely, is
he scratching more than usual? Mites burrow under the skin and cause a distressing
condition called mange, and the sooner you spot any problem, the sooner you can
get it treated, something your guinea pig will certainly thank you for. Sometimes
you may see little tiny nits walking on your guinea pigs fur, these are hay mites,
which are harmless and a simple shampoo will get rid of them for you.
The feet Check the nails, and never let them get too long. Guinea pigs have no fur on the
bottom of their feet, so check the bottom of their feet regularly for any sign of
soreness. If their feet are sore their bedding wants to be as soft as possible, wood
shavings and soft meadow hay is best.
The bottom
Yes, this bit needs checking too... The whole area should be clean and dry. If the
guinea pig is wet and smelly between its legs it may have a urine infection. Old
boys may also get a problem where their poo gets stuck, and they are no longer
able to eat the sticky caecotrophs as they should. Your vet will be able to show you
how to help them.
Some Common Guinea Pig Ailments
Guinea pigs that are fed well and kept clean rarely get ill. The most important thing
that a guinea needs every day is Vitamin C.
A carrot a day keeps the vet away! A guinea pig that does not get enough vitamin
C in its diet is more prone to infections, skin problems, and may even become
lame. They may develop wasting disease and gradually fade away. A good diet,
including some dry food that contains vitamin C is generally sufficient, but if you
are not sure, particularly in the winter, you can add extra to the drinking water.
Low sugar ribena or soluble vitamin C tablets are suitable for this purpose.
Skin conditions Help, my guinea pig is itchy and scabby!
The commonest condition that vets see is guinea pig mange. This is caused by a
mite (invisible to the naked eye) that burrows under the skin and makes the guinea
pig scratch his skin raw. The sooner this is treated the happier the guinea pig will
be, and it is better to go straight to the vet who will give the guinea pig some
special drops, either by mouth or injection, than try some shampoos first.
Eyes Help, my guinea pigs eye has gone a funny colour overnight!
The commonest eye problem is a corneal ulcer, a piece of hay may scratch the eye,
or get stuck in the eye and damage the surface (cornea) causing the eye to go
cloudy. Sometimes the piece of hay can be seen in the eye, it should be gently
bathed out, and the guinea pig taken to the vet as he will need antibiotic eye drops
to help the ulcer heal.
Nose Any discharge or sneezing may suggest that your guinea pig has a cold. However,
they can get hay stuck up their noses too! If they get a chest infection they can
make a very loud rattly noise as they breathe, and they need to visit the vet as soon
as possible.
Albino: A white guinea pig with pink eyes
Barbering: A condition in which loss of coat is caused by fur-chewing
Bloat: A build up of gas in the intestines, causing swelling and pain
Castration: A surgical procedure in boars where the testicles are removed. A
family planning procedure which allows them to live with a group of sows.
Enteritis: An infection in the intestinal tract. The most consistent symptom is
diarrhoea.
Gestation period: The length of the pregnancy (65-70 days)
Litter: The collective name for the young from one pregnancy
Malocclusion: A dental disease where the teeth overgrow, and prevent the guinea
pig from eating.
Mange: A skin condition caused by a burrowing mite, which causes severe
itching.
Pododermatitis: Also known as bumble foot, this is an infection in the footpad
which leads to swelling and pain.
Pruritis: The medical term for an itch.
Pups: Another name for the babies ( they are not known as Guinea Piglets)
Roan: This is the name for the colour where body is one colour (say black or red)
with white hairs evenly mixed throughout the coat. Dalmations are also roans. Two
roan guinea pigs should not be mated together as their offspring are often born
with teeth and eye problems.
Ruttling: The rattly noise that some guinea pigs make when they breathe. It may
be due to infection, but some flat faced breeds have noisy breathing anyway (the
bulldogs of the guinea pig world!)
Understanding Your Guinea Pig
Guinea pigs are very friendly creatures, with a lot to say for themselves. Firstly
there is the very loud welcoming weep weep. They will make this noise to greet
you, and to welcome the food you are bringing them. They will put so much
energy into this squeaking that their ears will move up and down at the same time.
These are happy guinea pigs.
Then there is the deep throaty rumble or purr. This is made when they meet a new
guinea pig for the first time, especially in a boy meets girl situation. If there is any
bickering between guinea pigs then this throaty rumble may be accompanied by
some teeth chattering.
Then there is the background of chat as they communicate with each other as they
feed, made up of little squeaks and chirps, no doubt talking about food!
When behaviour goes wrong Guinea pigs are social creatures, and will rarely
fight with each other. However, if there is not enough food around one dominant
female may start to bully the others. If there is disagreement within a group of
females it is important to provide several food bowls, and tubes to hide in. It is also
worth considering introducing a neutered male who will take control of law and
order.
If there is a lack of food, particularly a lack of hay, then dominant guinea pigs may
start chewing the coats of the others. This is known as barbering, and the culprit
will be the only one left with flowing locks! Barbering can also occur if the guinea
pigs are bored. So provide them with plenty of hay and let them take lots of
exercise and they are unlikely to start chewing each other.
What type of food should be given to guinea pig
Guinea Pigs like humans do not produce Vitamin C and need to be given it daily to ensure good health. Lack of vitamin C will cause scurvy. To maintain a good diet each Guinea Pig should be given 10mgs of vitamin C per day to 1kg body weight.
Pets Stores and Super Markets sell Guinea Pig food that has a vitamin C supplement. However this is not
recommended as the only source of vitamin C for your piggie's.
Fig. 1 was brought as Gerty Guinea Pig. However since finding out about Gerty Guinea Pig food I have noticed that a lot of pet stores call random Guinea Pig food gerty. However in Super Markets and Chain Pet Stores they sell the pre-bagged Gerty Guinea Pig food in sealed bags. Kornage and Millie prefer this Guinea Pig food to the others.
Fig.2 This is hard pellets of Guinea Pig food with added vitamin C. I thought I would buy this just to try them on it. They were not over keen. Nutmeg ate most of it but didn't tuck in to it like she does the food in fig. 3.
Fig.3 This is a no name Guinea Pig food with added vitamin C. This is Nutmeg's favourite dried food. However she doesn't like the seeds or the yellow flakes in it. None of my Piggie's seem to like seeds or yellow flakes.
They like the flat green flakes which I think are squashed peas? If I am wrong somebody please correct me. I did buy extra of these from a Pet store that had sacks of just Pea Flakes. I have since read
Fig.1
Fig.2
Fig.3
online that these should not be fed to a Guinea Pig in large amounts. I do not know if this is correct or not.
Although all the different kinds of food I have mentioned are designed for Guinea Pig's, you can not really compensate giving Guinea Pigs fresh vegetables daily. Not only are they good for them due to being full of vitamins but they actually much prefer the fresh stuff. They don't get quite as excited when I put down a bowl of dry food as they do when I put them
down a mixture of all their favourite veggies.
Fresh Food
I am no expert when it comes to what vitamins are in which vegetables. So I am going to give you a rough guide going on what I have been feeding my Guinea Pig's.
Daily my Guinea Pigs will get a random mix from the
following list:
Cucumber: If you own a Guinea Pig then you must have 'Plenty Of Cucumber!'
They love it! All four pig's with a plate in front of them with EVERY THING you can imagine on will always pick cucumber first!. When I got Kornage I hadn't kept Guinea Pigs before and didn't really know a lot about them. I did notice he didn't drink as much as my hamster so I was concerned. I fed him cucumber
initially because I felt it meant he was definitely getting some kind of water intake. I have since noticed that Guinea Pig's do not drink a lot. Millie however is an exception to this and can drink a bottle of water in 24 hours. She seems to always be at the water bottle. I was worried she wasn't able to use the bottle but the fact that air bubble rise when she
drinks is an indication that it works fine.
First thing in the morning I always give my piggie's a slice of cucumber each. When I come downstairs and go in the kitchen to make a cup of tea as soon as I open my fridge they will start mweeping to remind me not to forget them. It's the most awful feeling to hear them mweeping when you have run out of cucumber! This is why I buy plenty, at present a weeks shopping consists of at least 4 cucumbers. That's a cucumber
per piggy, however I normally start to run out towards the end of the week and have to get more.
I give my piggie's about 4 slices each per day of cucumber. It really depends, if it's a hot day I feed them cucumber that's been in the fridge and is chilled. I think it must be refreshing for them and help to cool them down even if only for 5 min's. I also keep one out on the side so it ripens more. When they are ripe they become very juicy and I feel are a
good source of water on days when they could become dehydrated.
As much as they love cucumber it however does not contain any goodness for them as its made up of water. Cucumber should not be given as a source of vitamin C It is more of a treat for them.
Carrots: I would say they are not over keen on carrots. However I find out of most of the fresh
vegetables these do tend to keep well in the fridge. When you can buy carrots with the leaves still attached you should because they like the leaves too.
Celery: All of the celery is good. I used to buy celery with no leaves. Now I buy the most leafy bunch I can.
Peppers: These are very full of vitamin C and very
good for Guinea Pigs. I have read online that 1/7th of a green bell pepper is enough vitamin C for a piggy a day. I tend to buy lots of different coloured ones and give a different kind each day. I cut up half of one to share out between them. Clean out all of the seeds when you give them to your Guinea Pig. I have read time and time again that no kind of seeds should be fed to Guinea Pigs. I am not sure if its because they can be toxic or fattening. However seeds is something I avoid giving them.
Parsley: This is a great source of vitamin C and they love it. Also you can grow it very easily in your garden. Supermarkets sell this fresh and its very cheap.
Baby Sweet Corn: My Guinea Pig's love baby sweet corn when it is still fresh and crunchy. Be warned if they are sat on you when they eat this it makes a real mess!
Fresh corn on the cob: When you can buy these fresh in season (Not the frozen type) I buy one and put it in the cage. The pigs are not over keen on this but do like to drag it in to a hidey hole and sit and munch on it.
Apple: My piggie's only like certain kinds of apple. I buy old fashioned english apples, the yellowish with red splashes on. I do not feed them this often as I
have read that apples can cause blistering around the Guinea Pig's mouth from the acid in them. I have never experienced this but have noted this and only feed apple about twice a week.
I think the green crunchy apples are more acidic than the old english and never feed them that kind.
Melon: My lot like to eat the skin of honey due melons. They are not so keen on the other kinds. I give them chilled melon on hot days when I have one.
Cauliflower leaves: It occurred to me when throwing away the leaves on a cauliflower that my pig's may actually like them. They do like the leafy part but not the stalk. They do not like the flower of it.
Broccoli: This is a good source of vitamin C but sometimes my pig's eat it and others they wont touch it.
Grapes: You can give Guinea Pig's a grape occasionally but they must be seedless. I haven't read anything about it but I do assume that if you gave a Guinea Pig too many of these it would surely upset their stomachs. So I would make this a treat now and then rather than part of their diet.
03/12/08 - Today I recieved an email from a lady who has heard different about grapes she wrote:-
I wanted to let you know that my vet told me that grapes may cause kidney failure. My guinea pig had 1/2 grape 2 weeks ago and now may have kidney disease. The vet said it's been proven to cause kidney trouble in dogs but just hasn't been proven yet in guinea pigs. Just thought you may want to put a
warning on your web page as a safety precaution. Thanks for all the useful info you've got here! - Cindy
09/01/09 - Another email regarding grapes
i have just been reading through the fresh foods you feed your guinea pigs and i got to the section about
grapes. i know that grapes are very high in natural sugars and as a result are fattening to guinea pigs, especially if they don't do a lot of exercise. i also would like to comment on the seed theory of yours. i think you may be right about them being toxic but i think because they are quite hard, the piggies may find them hard to chew and could choke on them as a result.
Cranberry Juice: My pigs like this sometimes. It's a
very high source of vitamin C and can be fed to them with a syringe. I have found my piggie's like cranberry and raspberry juice but I assume if I give them too much it will upset their stomach.
Romain Lettuce
I have been advised to include this in the list of things
that should be fed to Guinea Pigs on a regular basis. It is said to give them strong teeth and a shiny coat. The lady who wrote to me said she gave her Guinea Pigs 3 heads a day to eat in thier diet.
Iceburg lettuce should not be given due to toxin which cause an upset stomach.
I have found that my pigs definitely do not like strawberries, oranges, grapefruit, tomatoes.
What not to feed a Guinea Pig!!
Ice-burg lettuce is not suposed to be fed to Guinea Pig's because it contains toxins, however dark leaved lettuce is a good source of vitamins.
Spring Onion: These should not be fed to a Guinea
Pig
Cakes, biscuits, chocolate and dairy products should never be given to Guinea Pigs. It is very important to a Guinea Pigs digestive system that you do not incorporate this in to their diet.
Meat should never be fed to Guinea Pigs, they are 100% vegetarian.
Dark green leaved vegetables. I am not going to suggest you feed your Cavy on any of these. After a discussion with the vet about them I have decided to withdraw them from their diet. I had been told that spinach was something you could give to them rarely and they do love it but too much can cause an upset stomach. Green beans are also included in this list. I wanted the vet's advice and he said he wouldn't give a Guinea Pig this and in fact he felt all of the real dark green leaved vegetables were no good in their diet.
Potatoes should never be offered to them, I read online that Guinea Pigs tend to know what they can and can't eat from it's taste. When I first got Kornage I read that you could feed them potatoes and he didn't eat it, also when they are in the garden they taste weeds before eating them and there are type they wont eat. I have since read on many sites that you should never feed a Guinea Pig potatoes so I kind of figure the theory about they know what to eat is
right from the way Kornage turned his nose up at them.
I could go on listing food here all night. However I think if you just do some research on food before you give it to them to make sure you its ok and try and find a good balance of vitamin C with out too much calcium then your piggie should stay in good health.
Anatomy
Skeleton system with naming:
Body organs:
Cardiovascular/Respiratory System
a. Pharynx:
(1) Soft palate is continuous with base of
the tongue and lateral walls of the oral
cavity
(2) Opening into larynx is a small
intrapharyngeal ostium (AALAS Abstract #96, 1983)
b. Lungs:
(1) 3 left lobes (cranial, middle, caudal)
and 4 right lobes (cranial, middle,caudal, accessory)
(2) Pleural cavities are continuous (LAS 16(5): 411, 1966)
c. Arteries: 3 deviations from normal mammalian
vascular pattern (Amer. J. Anat. 139, 269- 284. 1974):
(1) There may be 2 or 3 pairs of renal
arteries (versus normal 1 pair in most
mammals).
(2) The abdominal aorta gives rise to a
celiomesenteric trunk instead of
separate celiac and cranial mesenteric
arteries.
(3) A bronchoesophageal artery passes from
the right subclavian, the right internal
thoracic, or the brachiocephalic trunk
instead of from the aorta.
6. Hemolymphatic System
a. Thymus: Present in immature animal
(1) Gradually involutes as the animal
matures.
(2) In adults may be completely gone or persist in caudal cervical or cranial mediastinum.
(3) Thymic tissue is replaced primarily
with fat as age progresses.
(4) In immature animals it is composed of 2
compressed lobulated glands on each side
of the ventral cervical midline.
(5) Extends from the angle of the mandible
approximately halfway to the thoracic
inlet (Cooper and Schiller, 1975).
(6) Accessory thymic lobes in most guinea
pigs; usually paired and adjacent to the
parathyroid gland or fused to it (Cooper
and Schiller, 1975).
(7) Guinea Pig used extensively for
immunologic studies because the cervical thymus is easily
removed (LAS 25, 82-84,1975).
b. Parathymic Lymph Nodes:
(1) Located in cervical region.
(2) Receive lymph from the thymus.
(3) Studied to determine the immunologic
inter-relationship between the thymus
and lymph nodes.
7. Gastrointestinal System
a. Tongue:
(1) Rostral one-third is free.
(2) Remainder attached to floor of oral
cavity.
(3) Small filiform papillae anteriorly,
large fungiform papillae posteriorly.
b. Stomach:
(1) No keratinized non-glandular portion
present i.e., all glandular.
c. Small Intestine:
(1) About 125 cm (50 in) in length
(2) Common bile duct enters duodenum 1 cm
caudal to pylorus.
d. Cecum:
(1) Occupies left side of abdominal cavity
(2) Large thin-walled sac 15-20 cm long.
(3) Accounts for about 15% of body weight.
(4) Has 3 taenia coli (dorsal, ventral and
medial)
(5) Produces out-pouchings called haustra.
e. Peyers patches:
(1) About nine flat white 1 mm diameter area
of lymphocyte aggregates on mucosal
surface.
f. Colon:
(1) Ascending, spiral ascending, transverse,and descending
portions.
g. Liver:
(1) 6 lobes: right and left lateral, right
and left medial, caudate and quadrate.
(2) Cystic duct from gallbladder joins
common hepatic duct to form commonbile
duct.
h. Pancreas:
(1) Divided into cranial and caudal lobes.
(2) Pancreatic duct enters duodenum 7 cm
distal to common bile duct.
i. Salivary Glands: 4 pairs present
Parotid
Mandibular
Sublingual
Molar (Zygomatic).
j. Microscopic Features of GI tract:
(1) Pseudohemosiderosis: normal
accumulation of hemosiderin in the lamina propria of the villa
of small and large intestines.
-*-
GUINEA PIG MODELING AND TEXTURING
(Gayathri)
We started by taking the pictures of our character guinea pig at the Zoo. Then as a modeler i needed some more images showing each and every part of guinea pig in detail.So i collected as many references i could from internet for eyes,mouth,legs andbody.Then to know the shapes properly,i collected images of skeleton
For the model sheet i used images as reference for getting front and profile views for head...
Then for body, legs i used one picture as an image plane for proportions to be maintained properly.This pic was scaled to 9cm in maya as the average size of guineapig was 9 inches of the whole character.
MODELING
I started with eye and basic shape of head
After basic shape of the head is done. I started with nose
Then I moved on to the placement of mouth
Next I moved onto the placement of ear
After complition of placement of the ear. I started the modeling of the ear
Modeling of the head was completed. I started the modeling body of the
guinea pig
Then I moved to placements of the legs
After complition of the body part. i started the modeling of the foot
Guinea pig front and back legs
After complition of the foot model I started the details to the model.
Model with wire frame....Front.
Model with wire frame....side view.
Model with wire frame....top view.
Now i exported the model as .obj....then for unwraping the model i used
Headus UV Layout, where i imported the .obj file and unwrappd the model. I
used 2 UV sets, for head, body and legs
This UV layout in maya.
TEXTURING
Now the model was ready with UV s unwrapped. Then i went
through the basic checklist and sent it for rigging and skinning. As the rigging
part was started i started the texturing part. Initially i broke up the body into 3
parts Head, legs and body, based on the 2 UV sets and exported each of them
as .obj. I used Mud box for texturing. I started preparing stencils for texturing
of guinea pig.
I started sculpting for head
After the Head was done i started sculpting the body
part....
Now the sculpting part is done and it was the time for the color to be
done....again i went back to reference images for colors of scales and the body
as a whole. As ours was a white guinea pig the character has to be in white
shades. So similarly to sculpting i started painting of guinea pig…………
So finally the coloring was done with sculpting...........
EXTRACTING TEXTURE MAPS
After the texturing was done, the Normal map, diffuse map, Displacement
map, and the VectorDisplacement maps are extracted from mud box.
Example: Diffuse map of Head and body
Then after all the maps are extracted, I imported them into maya using the
shading network where all the maps are connected to their respective
shaders.so now the model was finally ready with all the textures and was
ready for lighting.
Animation : (Amith)
While coming to animation part of Guinea Pig we
had taken many references of the guinea pig.
Also we had taken live video reference of guinea pig
and we observed the movements of it.We had
studied the movements of the character in
deepth.so,we understood the movements of the
guinea pig without confusion and it became
easy to make an overview of character,then we
started drawing and analyzing the character.
Then we had noted down some important points to
remember while animating the guinea pig.
It helped us to give basic movements of the
character how it responds to the sorroundings and
environments, the appeal of the character .
Main basic things are walk,run,jump,.etc we had got
certain idea through it. To what extend we need to
keep the key frames,timing,spacing,and the
secondary actions of the character.
When we have started doing animation we need to
match the character animation the video footage.
So,we have planned accordingly to the given video
footage,how many frames we have got in a
video,how to divide and animate it in limited frames
with perfect timing.Its a basic challenge to the
animation department to sink the animation with
live footage givinig realistic look.
Shot-1
In this shot we animated the walk and its head
movement ,the standing position of the character.
# In this shot there were problems arised to us.
Like wise we had got problem in gettng correct
spacing of the animation also we have got some
technical aspect in tracked footage.We also got
jerks in between the animation while keeping the
key poses.we need to maintain the volume of
character as per its proportions.
Shot-2
As the shot is zoom in shot we need to take care of
the facial expressions & the eye,mouth movements.
There is no need of animating lot of body parts in
this shot because they will not effect this shot in
camera view.
# after that we had got a small thing missing to this
animation,we have seen that ears are in static
postion then we reedited the shots.then Appeal of
character increased due to secodary animation in it.
Shot-3
The final shot is the character must go back into the
hole.we tried to animate the character to turn from
front to back to hole then walk towards hole.But it
didnt worked out in given limited frames.so we
directly kept the walk animation without the turn
but it took lot frames to animate.And there are
jerks & sliding in animation at the end.we
reanimated & slowed down the action in end.
RIGGINING & SKINING (Dinesh)
Before doing rigging we had studied the anotomy of
the guinea pig.Then we analyzied and how weights r
distributed to the bones on the body .Then we
started the rigging process
The rigging part of our character is included of two
stages.When we got the model we have done test
rig to the character.
Then we had got some problems in that rig test .
The loops of the model & proportions are not
appropriate & it doesnot supported to rig the
character.
Then it look awkward to work on that file .Then we
send that model back to modelling work to correct
the model again.
Then we got the model we have done rigging to the
new file we have done rig test with that model &
also we had animated it.
So we too got some more mistakes in the skinning
part.But up to the nessecity it was good.
Rigged model
Then we had got the final model with the correct
loops & approximate proportions then we easily
completed the rigging part .
And also the skinning part .we given the neccessary
controls over the body likee controlling the leg parts
& its fingers up to claws etc.
Again we have got to give model for blend
shapes.again its remodified and rigged it.
Bone structure
Match Moving
Match mover: J.VIVEK JOEL
As the shooted footage was forwarded to me.
There are 3 shots in our project ,.
Shot 01 – 320 frames
Shot 02 –164 frames
Shot 03 –192 frames.
The shots were tracked by me using pfTrack 0.5 software.
Problems faced by me:
There were few problems in shot01.
The white balance of the footage made the points to slide.
The focal length was not appropriate.
The grid was not getting arranged.
There were no problems in 2nd and 3rd shots.
Due to 1st shot it made easier for me to track 2nd and 3rd shots.
The shots were also well shooted and they were only pan
Solving:
I manipulated the footage by increasing the sharpness and contrast for a better track. For shot 1
The tracking was a trial and error method and I had to do it repeatedly.After the shots got exported into
Maya, now it was a real challenge for me.
I had to cross check the footage repeatedly to see whether the grid was moving or not.
I created the mesh of the paper weight and the surface by snapping the polygons to the track points.
Then I applied the Lambert and applied checker map to the mesh. Then I adjusted the uv in uv texture
editor.
Thus the tracking part of the project was completed and I forwarded it to the animator for alignment of
the character into the footag
SHOT: 1
SHOT: 2
SHOT:3
DISSERTATION – GUINEA PIG
P.ADITYA ( FUR, LIGHTING, RENDERING, COMPOSITIING )
My Dissertation character is GUINEA PIG. Our team did very hard work to complete this project
successfully. We took our footage on a table using a camera NIKON D7000. I faced some problems while
working on this project, but managed to get what we actually needed in final out put. My part in this
project is VFX (Fur, Lighting, Rendering, Compositing).
Final Model with Texture
FUR:
- I got the final model of guinea pig with textures. My job here is to apply fur to the existing final
model.
- I used shave and hair cut plugin to apply fur to the character.
- Starting, I have drawn the curves to the character according to reference I took for fur.
- I almost drawn 1400 curves and snapped to every vertex of the model.
- I then applied ‘default’ fur type from shave and hair cut and I combed the fur according to
curves I drawn.
- After making some tweets and modifications, I got what is necessary needed for my character.
- Faced some problems while applying fur, but finally everything is solved.
- In-between got problems in textures. Solved those things with our modeller. Again applied new
textures to the character.
- Got problems to fur after applying animation to the character. The fur went out of shape and
took lot of time to solve it. I again created curves and snapped to the new model file. Applied
everything again and got the final one what I actually needed.
- Now our model is ready with fur and its time for lighting and matching it to the environment.
LIGHTING:
- Lighting to the character is fun and completed in very less time.
- I used manual lighting as our character has fur and it doesn’t support IBL (Image Based Lighting)
- I used spot lights and area lights for lighting.
- I used mental ray shadows for fur and everything.
- I took HDR image as reference and kept lights according to the environment.
- After tweaking all lights and shadows, finally I got what I actually needed.
- In between got some problems in improving shadows, solved with the help of our faculty.
RENDERING:
- I got a hell problems in rendering passes. Most of them are unsolved.
- I used mental ray for rendering.
- I rendered only master beauty pass for our character, as occlusion and other passes didn’t work
out properly. Shave and hair cut doesn’t support occlusion for fur. That made big difference in
our final out put.
- Tried to use puppet shader for fur, but puppet doesn’t support batch render, again that is a big
problem for us.
- After applying animation to the character, at last I compromised everything and rendered only
master beauty pass. Still searching for solutions of this problems and i will solve this everything
soon.
Final Model with Fur and lighting
COMPOSITING:
- I composed everything using fusion and edited in after effects.
- I removed or cloned all tracking points from all footages that we used for tracking purpose.
- Tried to match the shadow of character and matched to the environment or footage.
- Did some color correction to the beauty pass to merge everything in the footage.
- Edited and arranged all shots according to our story board.
- Finally I created credits and added to the composition.
- Rendered in QuickTime(.mov) format using photo jpeg codec.