"In purebred dogs, intentionally breeding dogs of very similar appearance over several generations produces animals that carry many of the same
alleles*, some of which are detrimental. This is especially true if the dogs are closely related. This inbreeding among purebreds has exposed various genetic health problems not readily apparent in less uniform populations. Mixed-breed dogs are more genetically diverse due to the more haphazard nature of their parents' mating. "Haphazard" is not the same as "random" to a geneticist."
In addition there are millions of dogs in shelters awaiting owners in animal shelters across the world, therefore a moratorium on pure breeding dogs should be put in place globally for a minimum of 10 years.
And remember, its far more inexpensive to pick up a pooch from your local shelter
This has been a public service message from Caligari.
That is all.
*One of two or more forms of a gene. Sometimes, different alleles can result in different traits, such as color