The Chow Chow is a spitz-type of dog breed originally from Northern China. The Chow Chow is a sturdily built dog, square in profile, with a broad skull and small, triangular, erect ears with rounded tips. The breed is known for a very dense double coat that is either smooth or rough. The fur is particularly thick in the neck area, giving it a distinctive ruff or mane appearance. The coat may be shaded/self-red, black, blue, cinnamon/fawn, or cream.
The Labrador Retriever or simply Labrador is a British breed of retriever gun dog. It was developed in the United Kingdom from St. John's water dogs imported from the colony of Newfoundland, and was named after the Labrador region of that colony. It is among the most commonly kept dogs in several countries, particularly in the European world.
The Rhodesian Ridgeback is a large dog breed originally bred in Southern Africa. The original breed standard was drafted by F.R. Barnes, in Bulawayo, Southern Rhodesia, in 1922, and approved by the South African Kennel Union in 1927. Its forebears can be traced to the ridged hunting and guardian dogs of the Khoikhoi. These were interbred with European dogs by the early colonists of the Cape Colony for assisting in the hunting of lions.
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 Goldendoodle is a designer dog created by crossbreeding a Golden Retriever and a Poodle. First widely bred in the 1990s, they are bred in three different sizes—each corresponding to the size of Poodle used as a parent.
The Poodle, called the Pudel in German and the Caniche in French, is a breed of water dog. The breed is divided into four varieties based on size, the Standard Poodle, Medium Poodle, Miniature Poodle and Toy Poodle, although the Medium Poodle is not universally recognised. They have a distinctive thick, curly coat that comes in many colors and patterns, with only solid colors recognized by breed registries. Poodles are active and intelligent, and are particularly able to learn from humans. Poodles tend to live 10–18 years, with smaller varieties tending to live longer than larger ones.
A mongrel, mutt, or mixed-breed dog is a dog that does not belong to one officially recognized breed, including those that result from intentional breeding. Although the term mixed-breed dog is sometimes preferred, many mongrels have no known purebred ancestors.
The Rat Terrier is an American dog breed with a background as a farm dog and hunting companion. They share much ancestry with the small hunting dogs known as feists. Common throughout family farms in the 1920s and 1930s, they are now recognized by the United (UKC) and American Kennel Clubs (AKC) and are considered a rare breed. Rat Terriers are an intelligent and active breed that can be kept both for pest control and as a family pet.
The Peruvian Hairless Dog, Peruvian viringo, Peruvian Inca Orchid, naked dog, or Chimú dog is one of several breeds of hairless dog. Peruvian Hairless dogs were also called “perros Chinos” which translates directly to chinese dogs but was thought to have the meaning of “house-dogs” instead, as ”China” is a Quechua word for woman. The breed comes in a variety of sizes and colors, including chocolate-brown, elephant-grey, and copper. They are sensitive to extreme temperatures and require special care due to their lack of fur, including protection from the sun and cold. Historically, they have been associated with the Inca Empire and are officially recognized as part of Peru's cultural heritage.
Toy dog traditionally refers to a very small dog or a grouping of small and very small breeds of dog. A toy dog may be of any of various dog types. Types of dogs referred to as toy dogs may include spaniels, pinschers and terriers that have been bred down in size. Not all toy dogs are lap dogs.
A Schnauzer is a dog breed type that originated in Germany from the 14th to 16th centuries. The term comes from the German word for "snout" and means colloquially "moustache", or "whiskered snout", because of the dog's distinctively bearded snout. Initially it was called Wire-Haired Pinscher, while Schnauzer was adopted in 1879.
The Giant Schnauzer is a breed of dog developed in the 17th century in Germany. It is the largest of the three breeds of Schnauzer—the other two breeds being the Standard Schnauzer and the Miniature Schnauzer. Numerous breeds were used in its development, including the black Great Dane, the Bouvier des Flandres, and the German Pinscher. Originally bred to assist on farms by driving livestock to market and guarding the farmer's property, the breed eventually moved into the city, where it worked guarding breweries, butchers' shops, stockyards and factories. It was unknown outside of Bavaria until it became popular as a military dog during World War I and World War II.
The Dobermann is a German breed of medium-large domestic dog of pinscher type. It was originally bred in Thuringia in about 1890 by Louis Dobermann, a tax collector. It has a long muzzle and – ideally – an even and graceful gait. The ears were traditionally cropped and the tail docked, practices which are now illegal in many countries.
The Dutch Shepherd is a herding dog of Dutch origin. They were used by shepherds and farmers who needed a versatile dog, with few demands, and a dog that was able to adapt to a harsh and meager existence.
A hairless dog is a dog with a genetic disposition for hairlessness and hair loss. There are two known types of genetic hairlessness, a dominant and a recessive type. The dominant type is caused by ectodermal dysplasia as a result of a mutation in the FOXI3 autosomal gene.
The genetic basis of coat colour in the Labrador Retriever has been found to depend on several distinct genes. The interplay among these genes is used as an example of epistasis.
The Dalmatian is a breed of dog with a white coat marked with dark-coloured spots. Originally bred as a hunting dog, it was also used as a carriage dog in its early days. The origins of this breed can be traced back to present-day Croatia and its historical region of Dalmatia. It is thought that early ancestors of the breed were certain breeds of pointers and a spotted Great Dane. Today, it is a popular pet and many enthusiasts enter Dalmatians into kennel club competitions.
The Chihuahua is a Mexican breed of toy dog. It is named for the Mexican state of Chihuahua and is among the smallest of all dog breeds. It is usually kept as a companion animal or for showing.
Dogs have a wide range of coat colors, patterns, textures and lengths. Dog coat color is governed by how genes are passed from dogs to their puppies and how those genes are expressed in each dog. Dogs have about 19,000 genes in their genome but only a handful affect the physical variations in their coats. Most genes come in pairs, one being from the dog's mother and one being from its father. Genes of interest have more than one expression of an allele. Usually only one, or a small number of alleles exist for each gene. In any one gene locus a dog will either be homozygous where the gene is made of two identical alleles or heterozygous where the gene is made of two different alleles.
Forkead box I3 (FOXI3) is a protein that in humans is encoded by the FOXI3 gene. FOXI3 is a forkhead box transcription factor that is expressed in the development of hair and teeth. One of its mutations is a dominant allele responsible for the heterozygous Hh hairless trait in dogs. It was identified in 2008.
