Description of a Mixed-breed dog.

A mixed-breed dog (also called a mutt, crossbreed, mongrel, a bitsa, tyke, cur, or random-bred dog) is a dog that has characteristics of more than two breeds, or is a descendant of feral or pariah dog populations. The term "mutt" generally refers to a dog of unknown descent. 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 selectively bred from a mixed-breed population.