As sirteddykins said most purebred dogs can be traced back to some very established and respected lines. It is the most recent ancestors that really matter as far as health and quality. Some lines do not mix well with other bloodlines. A disreputable breeder will breed dogs despite genetic incompatibility. It seems innocent enough, two dogs that are outwardly lovely being bred seems logical but it is the genetics behind those dogs that really matter. Even reputable breeders sometimes have a bad match and those pups should be spayed/neutered so they cannot continue the bad mix.
Maybe some else here knows more about registries in your county. We have several here but only one that is actually reputable. |