system
Given the following post, respond as if you're commenting on Reddit:
human
The definition of a "purebred" dog should be liberalized to improve health. CMV.

While certain breeds of dog (Labrador retriever) are sufficiently popular that it is easy to find genetically diverse parents and breed healthy puppies, this is far from true for all dog breeds.  Some, such as pugs and bulldogs, suffer from serious congenital health problems.  These breeds would benefit from the selective addition of out-of-breed DNA, but current rules prevent this from occurring.  There should be some sort of liberalization that permits breeders to create a certified purebred pug with only 7/8 great-grandparents who are pugs (or some other such loophole).  That way people who want a purebred dog rather than a mutt can get their wish, but can nevertheless reap the benefits of genetic diversity.
gpt
I feel that a better way of handling this problem would be for the AKC to start enforcing breeding health requirements. At present, any backyard breeder can become AKC registered, oftentimes with nothing more than an official pedigree. Not requiring health standards in breeding is essentially what allows devastating congenital problems such as hip dysplasia to be reinforced in the gene pool.