Well I don't want to cause a ruckus but.... aren't dogs sold on limited reg. those that do not fit the breed standard? too small ,too long, some kind of small defect or deviation from standard? If not wouldn't that dog be held for someone who will show the dog?That is what you are trying to do(preserve the breed standard) so you wouldn't place a pup with show qualities in a pet home with or without full reg. right?and in so doing you sell ones that don't fit the standard they came from your litter and need to be re-homed.well that said when the perspective buyer gets the dog and breeds it with any yorkie well that is how you get dogs that do not fit the standard and are awkard.SO there is no guarantee about any dogs, just the breeders determination to do her/his professional best and learn all that they can.I read here before that even when you have a dog and bitch that is found free of genitic defects you can still get a pup that has one or more problems.WHERE DO THOSE PUPS GO? to the buyer? and if so are they spayed/neutered before leaving because we all know people will breed without papers and sell much cheaper. Or do we not care about those pets because by not having papers they can't trace back to your lines?