Depends on how you use the term "cull". I take the best from every litter and sell the rest as pets, or if they do have a known problem I would give that one away. That to me is a form of culling. Would I kill a puppy that was not acceptable, NO! If a puppy clearly had a deformation that would cause it to not lead a healthy life and I knew it was going to die anyway, I would have that one put to sleep. It's buyer beware when buying dogs, especially when you are buying what is suppose to be show quality or breeding quality.....not many people know what that means anymore! I breed Chows and our breed is in serious trouble, the dogs are dieing at very young ages, they have all sorts of structural problems, joint problems are horendous! This is from nothing more than people not knowing what is breeding quality and what is pet quality. This also comes from people line breeding and inbreeding on faulty stock. Case in point, a top show dog just died at the age of 7, that dog has been bred like crazy over the last few years, now he will pass that on to a whole bunch of offspring. That dog really brought nothing to the table in the form of health, he mearly contributed a nice head and a bunch of fur. We have PRA in our breed now, something that has never been seen before, and people are line breeding and inbreeding like crazy on the line that it was found in, now that disease will spread. I saw nothing special in this line other than it could win shows, there were certainly not enough health checks to back it up. There are just too many reckless breeders in the world, there is no way the good ones can offset what the bad ones are doing to the breed. :cry: