Friday, June 8, 2007

Mix Breed Dogs

A mix breed dogs (also called a mutt, crossbreed, mongrel, a bitsa, tyke, cur, or random-bred dog) is a dog that is a mixture of two or more breeds, or a descendant of feral or pariah dog populations. Dogs interbreed freely, except where extreme variations in size exist, so mixed-breed dogs vary in size, shape, and color, making them hard to classify physically. Historically, all purebred dogs have been selected from a mixed-breed population.

Mixed-breed dogs can be divided roughly into three types:

Crossbred dogs, which are mixtures of two known breeds. Dogs that result from two different purebred parents are known as crossbreeds. Some crossbreeds have traits that make them popular enough to be frequently bred deliberately, such as the Cockapoo—a cross between a Poodle and a Cocker Spaniel—and the Labradoodle, which mixes a Labrador Retriever with a Poodle. Other crossbreeds occur when breeders are hoping to create new breeds to add and reinforce characteristics from one breed into another breed. Most crossbreedings, however, occur accidentally.

Mixes among more than two breeds, such as when a crossbred dog mates with a purebred dog or with another crossbreed.

The generic pariah dog, or feral Canis lupus familiaris, where mixed breeding has occurred over many generations. These dogs tend to be yellow to light brown and of medium height and weight. This "genetic average" might also represent the appearance of the modern dog's ancestor.

There is no scientific justification for the belief that a purebred bitch is in any way tainted after mating with a dog of another breed. Future matings with dogs of the same breed will produce purebred puppies.

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