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46-732: The Scandinavian Coldblood Trotter is the result of cross-breeding of native coldblooded farm horses – in Norway the Dølehest , in Sweden the North Swedish Horse – with lighter and faster horses. Stud-books were started in 1939 in Norway and in 1964 in Sweden. From about 1950 inter-breeding between the two breeds began, to the point that they are now substantially considered to be a single breed. Both national types are endangered . In 2012 there were 1464 mares and 100 stallions of

92-469: A "breed" rather than a crossbreed. There are disadvantages to creating designer crossbreeds, notably the potential that the cross will be of inferior quality or that it will not produce as consistent a result as would breeding purebred animals. For example, the Poodle is a frequent breed used in creation of designer crossbreeds, due to its non-shedding coat, but that trait does not always breed true when it

138-514: A 75/25 cross, or a BC1 or F1b " backcross ." The breeding of two crossbreeds of the same combination of breeds, creating an F2 cross, an animal that is still a 50–50 cross, but it is the second filial generation of the combination. An F2 cross bred to an F2 cross creates an F3 cross. Similarly, an F2 animal bred to an F1 animal creates an F2b backcross. F3 crosses and greater are called "multi-generational" crosses. In dog breeding, three generations of reliable documented breeding can be considered

184-421: 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

230-654: 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

276-616: 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

322-508: A mix of characteristics from both, periodically producing a fleeced llama. The results are increasingly unpredictable when both parents are crossbreeds, with possibility of the offspring displaying characteristics of a grandparent, not obvious in either parent. Dogs: A crossbred dog is a cross between two (sometimes more) known breeds, and is usually distinguished from a mixed-breed dog , which has ancestry from many sources, some of which may not be known. Crossbreeds are popular, due to

368-498: 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

414-465: A mutt or a mongrel , its entire pedigree is known to descend from specific known animals. While the term is best known when applied to certain dog crossbreeds , other animals such as cattle, horses, birds and cats may also be bred in this fashion. Some crossbred breeders start a freestanding breed registry to record designer crossbreds, other crossbreds may be included in an "appendix" to an existing purebred registry. either form of registration may be

460-501: A specific environment, and are crossed with purebred bulls from another environment to produce a generation having traits of both parents. Sheep: The large number of breeds of sheep, which vary greatly, creates an opportunity for crossbreeding to be used to tailor production of lambs to the goal of the individual stockman. Llamas: Results of crossbreeding classic and woolly breeds of llama are unpredictable. The resulting offspring displays physical characteristics of either parent, or

506-500: A true-breeding population and have a closed stud book . Other types of recognized crossbreeding include that within the American Quarter Horse , which will register horses with one Thoroughbred parent and one registered Quarter Horse parent in the "Appendix" registry, and allow such animals full breed registration status as Quarter Horses if they meet a certain performance standard. Another well-known crossbred horse

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552-420: A yak and an American bison ). The Incas recognized that hybrids of Lama glama (llama) and Vicugna pacos (alpaca) resulted in a hybrid with none of the advantages of either parent. At one time it was thought that dogs and wolves were separate species, and the crosses between dogs and wolves were called wolf hybrids. Today wolves and dogs are both recognized as Canis lupus , but the old term "wolf hybrid"

598-609: 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 ,

644-515: 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

690-524: 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. 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

736-399: Is an organism with purebred parents of two different breeds, varieties, or populations. A domestic animal of unknown ancestry, where the breed status of only one parent or grandparent is known, may also be called a crossbreed though the term "mixed breed" is technically more accurate. Outcrossing is a type of crossbreeding used within a purebred breed to increase the genetic diversity within

782-451: 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

828-478: 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

874-431: Is often called a "moggie". A horse of unknown bloodlines is called a grade horse . A designer crossbreed or designer breed is a crossbred animal with purebred parents, usually registered with a breed registry , but from two different breeds . These animals are the result of a deliberate decision to create a specific crossbred animal. Less often, the animal may have more than two pure breeds in its ancestry, but unlike

920-432: Is part of a designer cross. Also, because breeders of crossbred animals may be less careful about genetic testing and weeding out undesirable traits, certain deleterious dominant genes may still be passed on to a crossbreed offspring. In an F2 cross, recessive genetic traits may also return if the parent animals were both carriers of an undesired trait. Mixed-breed dog A mongrel , mutt , or mixed-breed dog

966-423: Is still used. A mixed-breed animal is defined as having undocumented or unknown parentage, while a crossbreed generally has known, usually purebred parents of two distinct breeds or varieties. A dog of unknown parentage is often called a mixed-breed dog, "mutt" or " mongrel ." A cat of unknown parentage is often referred to as a domestic short-haired or domestic long-haired cat generically, and in some dialects

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1012-479: Is the Anglo-Arabian , which may be produced by a purebred Arabian horse crossed on a Thoroughbred, or by various crosses of Anglo-Arabians with other Anglo-Arabians, as long as the ensuing animal never has more than 75% or less than 25% of each breed represented in its pedigree. A hybrid animal is one with parentage of two separate species, differentiating it from crossbred animals, which have parentage of

1058-483: Is the most common coat colour, followed by chestnut and black. The dun gene and cream gene are present in the genetic material, but not white nor any variations of pinto . The Coldblood Trotter has a relatively small and square head with large nostrils. It is well suited for the cold conditions in Scandanivia, and it can develop large amounts of winter hair, having less need for blankets in winter. Compared to

1104-535: Is the process of breeding such an organism. It can be beneficially used to maintain health and viability of organisms. However, irresponsible crossbreeding can also produce organisms of inferior quality or dilute a purebred gene pool to the point of extinction of a given breed of organism. Cats: The many newly developed and recognized breeds of domestic cat are crossbreeds between existing, well-established breeds (sometimes with limited hybridization with some wild species), to either combine selected traits from

1150-614: The Standardbred it is smaller, heavier, and more compact in build. It is not as fast as the Standardbred. The Coldblood Trotter is mostly bred in Norway and Sweden. Coldblood Trotters are very rarely found outside the Nordic countries . The coldblood trotter is bred for use in harness racing . The two types compete in shared heats that exclude entry of light trotter breeds or Finnhorses . Cross-breeding A crossbreed

1196-484: The foundation stock , or propagate a rare mutation without excessive inbreeding . However, some nascent breeds such as the Aegean cat are developed entirely from a local landrace population. Most experimental cat breeds are crossbreeds. Cattle: In cattle, there are systems of crossbreeding. In many crossbreeds, one animal is larger than the other. One is used when the purebred females are particularly adapted to

1242-421: The warmblood breeds used in the sport horse disciplines, usually registered in an open stud book by a studbook selection procedure that evaluates conformation, pedigree and, in some animals, a training or performance standard. Most warmblood breeds began as a cross of draft horse breeds on Thoroughbreds , but have, in some cases, developed over the past century to the point where they are considered to be

1288-495: The Norwegian breed; by 2019 those numbers had fallen to 764 and 64, for a total breeding stock of 828 head. The corresponding numbers for Sweden in 2019 were 1380 and 180. The conservation status of both is reported to DAD-IS as 'at risk/endangered'. The average height at the withers for stallions is 154 cm (15.1 hands ), and all individuals should stand at least 148 cm (14.2 hands ). Bay in all its variations

1334-489: 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 the origins of dog breeds. Purebred dogs have been, for the most part, artificially created from random-bred populations by human selective breeding with

1380-451: The belief that they have increased vigor without loss of attractiveness of the dog. Certain planned crossbreeding between purebred dogs of different breeds are now widely known as "designer dogs" and can produce puppies worth more than their purebred parents, due to a high demand. Horses: Crossbreeding horses is often done with the intent of ultimately creating a new breed of horse. One type of modern crossbreeding in horses created many of

1426-426: 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 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

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1472-433: The breed, particularly when there is a need to avoid inbreeding . In animal breeding, crossbreeds are crosses within a single species, while hybrids are crosses between different species. In plant breeding terminology, the term crossbreed is uncommon, and no universal term is used to distinguish hybridization or crossing within a population from those between populations, or even those between species. Crossbreeding

1518-518: 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

1564-419: The first step in recording and tracking pedigrees in order to develop a new breed. The purpose of creating designer crossbreds is usually one or more of the following reasons: Breeders of designer crossbreds borrow the technical language from hybrid plant breeding: A first generation, 50–50 crossbred is an F1 cross . Subsequent generations may see a purebred animal crossed back on a crossbred, creating

1610-429: 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

1656-450: 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

1702-508: 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

1748-432: 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,

1794-474: 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

1840-486: 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 the United Kingdom , mongrel is the unique technical word for

1886-418: 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 a single recognized breed. Unlike mixed-breeds, crossbreed dogs are often

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1932-429: 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

1978-474: 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

2024-404: The same species. Hybrids are usually, but not always, sterile. One of the most ancient types of hybrid animal is the mule , a cross between a female horse and a male donkey . The liger is a hybrid cross between a male lion and female tiger . The yattle is a cross between a cow and a yak . Other crosses include the tigon (between a male tiger and female lion) and yakalo (between

2070-436: 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

2116-490: 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

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