I can't speak for other breeder only for myself- but with the dedication to this breed - any pup that would have a under bite would never leave my home with out a s/n contract and I would determine who was throwing this trait my dam or sire and they would be s/n as well- this is such a in justice- then why not breed anything???? to what ever???? To me this is just bad breeding???? Why do the rest of us breeders go through pain staking and costly experience to bring out the best breed yorkies we can while others have no dedication. It is not whether it is someones preference it is what is best for the breed and there should be no question on what to do in this case. Then why not breed bad patella's or liver shunt, cotton coats and the list can go on, to me it is all the same. All of this is unexceptable. If you want to breed, breed with knowledge of the standard. Sorry if I hurt anyones feelings here, that isn't my intentions at all. Don't ever settle for breeding pet quality, even if you aren't breeding for show quality at least breed to the standard.