You know what I meant, because you had "forgotten" to mention what I had also written:

. Technically culling doesn't always mean killing
Yes, responsible breeders cull by discontinuing any line that doesn't respond well to the standard or isn't in good health. But a responsibe breeder would NEVER kill a puppy if it doesn't match up to a standard.

And I don't think that a genetic disorder is any reaon to kill a puppy without giving it a chance to live. My dog has cancer -- a genetic disease. Would I kill her? No way in Hell! Maybe if it was a disorder where the pup's chances of living are minimal and that the pup would likely suffer, then is the time to consider euthenization.