The phrase "breed faults" refers to the negative or undesirable traits that are passed down from parent animals to their offspring during breeding. Full definition
Just a warning Rex rabbits in my experience can be very susceptible to Gastric hairballs or sometimes called GI which has been quite an expensive breed fault. (petpeoplesplace.com)
Since the idea of purebred dog breeding is to produce puppies that will grow up to look like a particular breed, dogs with a disqualifying breed fault should not be bred. (canismajor.com)
This is a breeder's tool that was intended to limit the breeding of pups with disqualifications and or other serious breed faults. (breedingbetterdogs.com)