The guinea pig or domestic guinea pig, also known as the cavy or domestic cavy, is a species of rodent belonging to the genus Cavia in the family Caviidae. Breeders tend to use the name "cavy" for the animal, but "guinea pig" is more commonly used in scientific and laboratory contexts. Despite their name, guinea pigs are not native to Guinea, nor are they closely related to pigs. They originated in the Andes region of South America, where wild guinea pigs can still be found today. Studies based on biochemistry and hybridization suggest they are domesticated animals that do not exist naturally in the wild, and are descendants of a closely related cavy species such as C. tschudii. They were originally domesticated as livestock for a source of meat, and are still consumed in some parts of the world.
The Bengal cat is a breed of hybrid cat created from crossing of an Asian leopard cat, with domestic cats, especially the spotted Egyptian Mau. It is then usually bred with a breed that demonstrates a friendlier personality, because after breeding a domesticated cat with a wildcat, its friendly personality may not manifest in the kitten. The breed's name derives from the leopard cat's taxonomic name.
The Sphynx cat also known as the Canadian Sphynx, is a breed of cat known for its lack of fur. Hairlessness in cats is a naturally occurring genetic mutation, and the Sphynx was developed through selective breeding of these animals, starting in the 1960s.
The fancy rat is the domesticated form of Rattus norvegicus, the brown rat, and the most common species of rat kept as a pet. The name fancy rat derives from the use of the adjective fancy for a hobby, also seen in "animal fancy", a hobby involving the appreciation, promotion, or breeding of pet or domestic animals. The offspring of wild-caught specimens, having become docile after having been bred for many generations, fall under the fancy type.
The Chinese Crested Dog is a hairless breed of dog. Like most hairless dog breeds, the Chinese Crested Dog comes in two varieties, without hair and with hair, which can be born in the same litter: the hairless and the powderpuff.
The Portuguese Water Dog originated from the Algarve region of Portugal. From there the breed expanded to all around Portugal's coast, where they were taught to herd fish into fishermen's nets, retrieve lost tackle or broken nets, and act as couriers from ship to ship, or ship to shore. Portuguese Water Dogs rode in fishing trawlers as they worked their way from the Atlantic waters of Portugal to the waters off the coast of Iceland fishing for cod.
The Snowshoe is a rare breed of domestic cat originating in the United States of America in the 1960s. The Snowshoe is a short-haired bicolour colourpoint breed. Snowshoes were first produced when a Siamese breeder's cat gave birth to three kittens with white feet. The breeder, Dorothy Hinds-Daugherty, then began a breeding program to produce what were originally called "Silver Laces", crossing the strangely marked Siamese cats with bicolour American Shorthair cats and other breeds. Despite having existed for 45 years, Snowshoes are rare due to the difficulty of reproducing the correct coat markings.
The Donskoy cat, also known as Don Sphynx or Russian Hairless, is a hairless cat breed of Russian origin. It is not related to the better-known Sphynx cat whose characteristic hairlessness is caused by a recessive mutation in the keratin 71 gene. The Donskoy's hairlessness, on the other hand, is caused by a dominant mutation.
The Netherland Dwarf is a breed of domestic rabbit that originated in the Netherlands. Weighing 1.1–2.5 pounds (0.50–1.13 kg), the Netherland Dwarf is one of the smallest rabbit breeds. Its popularity as a pet or show rabbit may stem from its neotenic appearance. The Netherland Dwarf is recognised by both the American Rabbit Breeders Association (ARBA) and the British Rabbit Council (BRC). The Netherland Dwarf is often confused with the Polish breed of rabbit, but the latter has longer ears, a non-brachycephalic head and less cobbiness.
The rex mutation is a genetic variation in mammals that results in soft curly fur. These effects are due to changes in the structure of groups of hairs and cross-section of individual hairs. The rexed coats are unusual but occur in cats, rats, rabbits, horses, and dogs. The mutations, infrequent and spontaneous, occur in a variety of genes and genetic regulatory structures. The diversity of genetic factors results in variable coat thickness/density and fur length. A similar mutation can affect the feathers of birds.
Dermoid sinus is thought to be a genetic skin condition in dogs. It is also known as pilonidal sinus. However, unlike pilonidal sinus in humans, the dermoid sinus in dogs is a neural tube defect. Dermoid sinus is sometimes also confused with dermoid cyst.
Junctional epidermolysis bullosa (JEB) is an inherited disorder that is also known as red foot disease or hairless foal syndrome. JEB is the result of a genetic mutation that inhibits protein production that is essential for skin adhesion. Therefore, tissues, such as skin and mouth epithelia, are affected. Blisters form over the entire body causing pain and discomfort, and open sores leave newborn foals highly susceptible to secondary infection. The condition can be categorized into two types of mutations: JEB1 and JEB2. JEB1 is found in Belgian Draft horses, as well as other related Draft breeds. In contrast, JEB2 is found in American Saddlebred horses.
The Abyssinian is a breed of guinea pig that is relatively common as both a pet and show animal. The Abyssinian is set apart from other breeds of guinea pig by its coat, which is marked with radially growing swirls or cowlicks of hair referred to as rosettes.
Acromelanism or point coloration is a genetically determined, temperature-dependent pigmentation pattern, with full expression only occurring on legs, ears, tail, face and scrotum. It is most recognized as the coloration of Siamese and related breeds of cat, but can be found in dogs, rabbits, rats, mice, sheep, guinea pigs, minks, and gerbils.
The Himalayan rabbit is a small breed of rabbit with similar markings to the Californian rabbit. The body is white with colored points, recognized colors are black, blue, chocolate and lilac.
The Lykoi is a breed of cat derived from a natural mutation causing a form of hypotrichia found in domestic short-haired cats. The mutation has occurred in domestic cats over the last 20 years. DNA testing has been done by UC Davis to confirm that the cats do not carry the Sphynx/Devon Rex gene. The breed was developed by Brittney Gobble in Vonore, Tennessee.
The Baldwin guinea pig is a breed developed from a spontaneous genetic mutation in Carol Miller's show-line of white crested golden agouti. Though born fully furred, Baldwin guinea pigs begin to lose their fur at two to five days of age, starting at the nose and leaving them almost entirely hairless by about two months of age. They retain whiskers and sometimes a few hairs on their feet.
Naked foal syndrome (NFS) is a genetic disorder specific to the Akhal-Teke horse breed. A rare genodermatosis, it is characterized by almost complete hairlessness and mild ichthyosis. The condition is inherited as a monogenic autosomal recessive trait, and affected horses typically die between a few weeks and three years of age. The exact cause of death in NFS-affected horses is not clear.
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