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Concept
Mongrel
Summary
A mongrel, mutt or mixed-breed dog is a dog that does not belong to one officially recognized breed and including those that are the result of 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 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.
File:Mongrel.jpg|[[DNA sequencing]] showed this mongrel dog to be a mix of [[Labrador retriever]], [[Bull Mastiff]], [[Chow Chow|Chow]], [[Australian Cattle Dog]], [[Corgi]], and [[Pit Bull]].
File:Mongrel dog.jpg|[[Spinone Italiano]]-[[German Shepherd]] mixed-breed dog
File:Heterochromia dog sideways.jpg|[[Australian Shepherd]]-[[Border Collie]] mixed-breed dog
File:DogsMixedBreedlittermates.jpg|Although these mongrels are [[Litter (animal)|littermates]] of an [[Australian Shepherd]] mother, they look quite different and neither exactly resembles that breed.
File:Mexican Street Dog.jpg|A Mexican street mutt
File:Mongrel dog.png|Mongrel of visually indeterminable lineage
File:Vira lata sem identificacao.jpg|Mid-size Brazilian mixed-breed dog
File:Zazu the dog on Lion's Head mountain 34.jpg|A two year old dog of unknown parentage, possibly Australian Shepherd and [[Golden Retriever]].
File:Безпородний собака.jpg|Ukrainian mixed-breed dog
In the United States, the term mixed-breed is a favored synonym over mongrel among individuals who wish to avoid negative connotations associated with the latter term.
Official source
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