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35-624: The name "Cairn Terrier" was a compromise suggestion when the breed was brought to official shows in the United Kingdom in 1909, initially under the name "Short-haired Skye terrier". This name was not accepted by the Kennel Club when faced with opposition from breeders of the Skye Terrier . The alternative name Cairn Terrier was adopted. Cairn terriers originated in the Scottish Highlands and

70-421: A blond coat and, therefore, produce offspring looking unlike their parents. Starting in 2007, genetic analysis has become available to the public. The companies claim their DNA -based diagnostic test can genetically determine the breed composition of mixed-breed dogs. These tests are still limited in scope because only a small number of the hundreds of dog breeds have been validated against the tests, and because

105-651: A common foundational breed, making them difficult to separate genetically. For example, Labrador Retrievers , Flat-coated Retrievers , Chesapeake Bay Retrievers , and Newfoundland dogs share a common ancestry with the St. John's water dog – a now-extinct naturally occurring dog landrace from the island of Newfoundland. The theory of hybrid vigor suggests that as a group, dogs of varied ancestry will be generally healthier than their purebred counterparts. In purebred dogs, intentionally breeding dogs of very similar appearance over several generations produces animals that carry many of

140-616: A desired physical trait. The genetic health of hybrids tends to be higher. Healthy traits have been lost in many purebred dog lines because many breeders of showdogs are more interested in conformation – the physical attributes of the dogs in relation to the breed standard – than in the health and working temperament for which the dog was originally bred. Populations are vulnerable when the dogs bred are closely related. Inbreeding among purebreds has exposed various genetic health problems not always readily apparent in less uniform populations. Mixed-breed dogs are more genetically diverse due to

175-470: A life expectancy of 13.42 years. A 2024 UK study found a life expectancy of 14 years for the breed compared to an average of 12.7 for purebreeds and 12 for crossbreeds . Some of the more common hereditary health problems found in the Cairn are: The breed is predisposed to atopic dermatitis. Skye Terrier The Skye Terrier is a Scottish dog breed that is a long, low, hardy terrier and "one of

210-493: A rough-and-ready appearance, free of artifice. The Cairn Terrier was registered into the American Kennel Club in 1903. Cairn Terriers tend to look similar to Norwich Terriers , but with some differences (for example the shaggy fur). The outer layer of fur is shaggy, but they have a soft, downy undercoat. The ideal weight is 4.5-7.3 kg (10-16 lb), and the height 9–13 in (23–33 cm). A 2015 French study found

245-432: A single recognized breed. Unlike mixed-breeds, crossbreed dogs are often the product of artificial selection – intentionally created by humans, whereas the term mongrel specifically refers to dogs that develop by natural selection , without the planned intervention of humans. The words cur , tyke , mutt , and mongrel are used, sometimes in a derogatory manner. There are also regional terms for mixed-breed dogs. In

280-593: Is prekoplotski avlijaner ( over-the-fence yard-dweller ). In Russia , a colloquial term дворняга (yard-dweller) is used most commonly. In the Philippines , mixed-breed street dogs are often called askal , a Tagalog -derived contraction of asong kalye (”street dog"), while in Singapore, they are known as Singapore Specials. In Puerto Rico , they are known as satos ; in Venezuela they are called yusos or cacris ,

315-515: Is vira-lata ( trash-can tipper ) because of homeless dogs who knock over trash cans to reach discarded food. In Newfoundland , a smaller mixed-breed dog is known as a cracky , hence the colloquial expression "saucy as a cracky" for someone with a sharp tongue. Guessing a mixed-breed's ancestry can be difficult even for knowledgeable dog observers, because mixed-breeds have much more genetic variation than purebreds. For example, two black mixed-breed dogs might each have recessive genes that produce

350-451: Is because current accepted breeding practices within the pedigreed dog community result in a reduction in genetic diversity, and can result in physical characteristics that lead to health issues. Studies have shown that crossbreed dogs have a number of desirable reproductive traits. Scott and Fuller found that crossbreed dogs were superior mothers compared to purebred mothers, producing more milk and giving better care. These advantages led to

385-470: Is known as a feist . Slang terms are also common. Heinz 57 , Heinz, or Heinz Hound is often used for dogs of uncertain ancestry, in a playful reference to the "57 Varieties" slogan of the H. J. Heinz Company . In some countries, such as Australia, bitsa (or bitzer ) is sometimes used, meaning "bits o' this, bits o' that". In Brazil and the Dominican Republic , the name for mixed-breed dogs

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420-535: The Cambridge University Department of Veterinary Medicine found that the condition is not actually a form of hepatitis . Prognosis varies between dogs and no gene has been identified as causing the condition nor has any heritability been properly demonstrated. A 2024 UK study found a life expectancy of 12.4 years from a sample of 39 deaths for the breed compared to an average of 12.7 for purebreeds and 12 for crossbreeds . These dogs were found on

455-526: The Isle of Skye , and the dogs were then named Skye Terriers. Some confusion exists in tracing its history because, for a certain time, several different breeds had the same name "Skye Terrier". The loyal dog, said to have been present under the petticoat of Mary, Queen of Scots at her execution, has been ascribed as a Skye Terrier. In 1840, Queen Victoria made the breed fancy, keeping both drop-(floppy) and prick-(upwards) eared dogs. A colour lithograph of Skye Terriers

490-532: The Isle of Skye . Prior to 1873, terriers in Scotland were collectively referred to as 'Scottish Terriers'. In the early days of the breed's establishment, the name 'short haired Skye Terrier' was used. After concerns raised by the Skye Terrier Club, the name 'Cairn Terrier' was given to the breed instead. The name 'Cairn Terrier' comes from Cairn , where the terriers often flushed out vermin. The Kennel Club of

525-612: The United Kingdom , mongrel is the unique technical word for a mixed-breed dog. North Americans generally prefer the term mix or mixed-breed . Mutt is also commonly used in the United States and Canada . Some American registries and dog clubs that accept mixed-breed dogs use the term All-American to describe mixed-breed dogs. There are also names for mixed-breeds based on geography, behavior, or food. In Hawaii, mixes are referred to as poi dogs, although they are not related to

560-589: The United Kingdom gave the Cairn Terrier a separate register in 1912; the first year of recognition, 134 were registered, and the breed was given Championship status. Terry was a Cairn Terrier actor who played Toto in the Wizard of Oz. The Cairn Terrier has a harsh, weather-resistant outer coat that can be black, cream, wheaten, red, sandy, gray, or brindled . Pure black, black and tan, and white are not permitted by many kennel clubs . While registration of white Cairns

595-530: The breed is under threat of extinction with only 30 born in the UK in 2005. It is today one of the most endangered of the Vulnerable Native Breeds of that country. The breed may disappear completely within 40 years. Mongrel 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

630-509: The extinct Hawaiian Poi Dog . In the Bahamas and the Turks and Caicos Islands , the common term is potcake dogs (referring to the table scraps they are fed). In South Africa, the tongue-in-cheek expression pavement special is sometimes used as a description for a mixed-breed dog. In Trinidad and Tobago , these mixed dogs are referred to as pot hounds ( pothong ). In Serbia , a similar expression

665-429: The lack of genetic diversity. If the dog breed is popular, and the line continues, over hundreds of years diversity increases due to mutations and occasional out-breeding. This is why some of the very old breeds are more stable. One issue is when certain traits found in the breed standard are associated with genetic disorders. The artificial selective force favors the duplication of the genetic disorder because it comes with

700-446: The latter being a contraction of the words callejero criollo (literally, street creole, as street dogs are usually mongrels); and in Chile and Bolivia , they are called quiltros . In Costa Rica , it is common to hear the word zaguate , a term originating from a Nahuatl term, zahuatl , that refers to the disease called scabies . In the rural southern United States, a small hunting dog

735-508: The low risk category". Data from Denmark also suggest that mixed breeds have greater longevity on average compared to purebreds. A British study showed similar results, but a few breeds (notably Jack Russell Terriers , Miniature Poodles and Whippets ) lived longer than mixed breeds. In one study, the effect of breed on longevity in the pet dog was analyzed using mortality data from 23,535 pet dogs. The data were obtained from North American veterinary teaching hospitals. The median age at death

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770-432: The more haphazard nature of their parents' mating. The offspring of such matings might be less likely to express certain genetic disorders because there might be a decreased chance that both parents carry the same detrimental recessive alleles, but some deleterious recessives occur across many seemingly unrelated breeds, and therefore merely mixing breeds is no guarantee of genetic health. When two poor specimens are bred,

805-467: The most endangered native dog breeds in the United Kingdom " according to the Kennel Club . The Skye is double coated with a short, soft undercoat and a hard, straight topcoat . The shorter hair of the head veils the forehead and eyes, forming a moderate beard. The ears are generally well feathered and, in prick-eared examples, the hair normally falls like a fringe, accenting the form, and blending with

840-523: The offspring could inherit the worst traits of both parents. This is commonly seen in dogs that came from puppy mills . Several studies have shown that mixed-breed dogs have a health advantage over purebred dogs. A German study finds that "mongrels require less veterinary treatment". Studies in Sweden have found that "Mongrel dogs are less prone to many diseases than the average purebred dog" and, when referring to death rates, that "mongrels were consistently in

875-498: The origins of dog breeds. Purebred dogs have been, for the most part, artificially created from random-bred populations by human selective breeding with the purpose of enhancing desired physical, behavioral, or temperamental characteristics. Dogs that are not purebred are not necessarily a mix of such defined breeds. Therefore, among some experts and fans of such dogs, mongrel is still the preferred term. Dog crossbreeds , sometimes called designer dogs , also are not members of

910-422: The prick- and drop-eared types. When prick, they are medium-sized, carried high on the skull and angled slightly outwards. In 1998, 'Skye terrier hepatitis' was described from biopsies of the livers of nine related Skye Terriers. This condition is not known in any other breed and the aetiology is unknown. It causes severe liver disease with scar tissue formation that may progress to cirrhosis . Researchers with

945-429: The same alleles , some of which are detrimental. If the founding population for the breed was small, then the genetic diversity of that particular breed may be small for quite some time. When humans select certain dogs for new breeds, they artificially isolate that group of genes and cause more copies of that gene to be made than might have otherwise occurred in nature. The population is initially more fragile because of

980-474: The same breed in different geographical areas may have different genetic profiles. The tests do not test for breed purity, but for genetic sequences that are common to certain breeds. With a mixed-breed dog, the test is not proof of purebred ancestry, but rather an indication that those dogs share common ancestry with certain purebreds. The American Kennel Club does not recognize the use of DNA tests to determine breed. Many newer dog breeds can be traced back to

1015-404: The side locks. Fawn, dark or light silver-grey, and cream are the standard colours. Regardless of colour all Skye terriers should have black points on their ears. muzzle and nose. There is generally no further patterning on the body, but a small white spot on the chest is relatively common. Except for the shape and size of the ears, there is no significant difference nor preference given between

1050-623: The term mixed-breed dog is sometimes preferred, many mongrels have no known purebred ancestors. Crossbreed dogs, and " designer dogs ", while also a mix of breeds , differ from mongrels in being intentionally bred. At other times, the word mongrel has been applied to informally purpose-bred dogs such as curs , which were created at least in part from mongrels, especially if the breed is not officially recognized. Although mongrels are viewed as of less commercial value than intentionally bred dogs, they are thought to be less susceptible to genetic health problems associated with inbreeding (based on

1085-520: The theory of heterosis ), and have enthusiasts and defenders who prefer them to intentionally bred dogs. Estimates place the prevalence of mongrels at 150 million animals worldwide. In the United States, the term mixed-breed is a favored synonym over mongrel among people who wish to avoid negative connotations associated with the latter term. The implication that such dogs must be a mix of defined breeds may stem from an inverted understanding of

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1120-436: Was determined for purebred and mixed-breed dogs of different body weights. Within each body weight category, the median age at death was lower for purebred dogs compared with mixed-breed dogs. The median age at death was "8.5 years for all mixed breed dogs, and 6.7 years for all pure breed dogs" in the study. In 2013, a study found that mixed breeds live on average 1.2 years longer than purebreds, and that increasing body weight

1155-506: Was included in "The Illustrated Book of the Dog" by Vero Shaw in 1881. This increased its popularity and the Skye Terrier came to America due to this. The AKC recognized the breed in 1887, and it quickly appeared on the show scene. Its popularity has significantly dropped and now it is one of the least known terriers. There is little awareness of its former popularity. There are concerns that

1190-490: Was negatively correlated with longevity (i.e. the heavier the dog, the shorter its lifespan). Another study published in 2019 confirmed this 1.2 year difference in lifespan for mixed-breed dogs, and further demonstrated negative impacts of recent inbreeding and benefits of occasional outcrossing for lifespan in individual dogs. Studies that have been done in the area of health show that mixed-breeds on average are both healthier and longer-lived than their purebred relations. This

1225-507: Was once permitted, after 1917, the American Kennel Club required them to be registered as West Highland White Terriers . A notable characteristic of Cairns is that brindled Cairns frequently change colour throughout their lifetimes. It is not uncommon for a brindled Cairn to become progressively more black or silver as it ages. The Cairn is double-coated , with a soft, dense undercoat and a harsh outer coat . A well-groomed Cairn has

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