Are Purebred Dogs Too Closely Bred?
Purebred dogs can be inbred, line bred or out crossed. Inbreeding is the mating of closely related individuals. This is only done when the individuals are exceptional specimens. Line breeding is the mating of more distantly related individuals. Out crossing is the mating of unrelated individuals. Inbreeding and line breeding are tools that breeders use to set the predictability of the occurrence of certain traits. Out crossing is used to introduce a trait that can’t be found in the present breeding program. Good breeders use these tools in conjunction with genetic screening to cull unwanted traits. When knowledgeable breeders are using these tools together they can breed beautiful, sound, healthy animals. As a groomer I have seen many crossbreds that are genetic nightmares. They are obviously the result of the mating of inferior animals. It does not lend much credibility to the hybrid vigor theory.
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