Each decision is on a case by case basis. I don't believe that most defects are caused by weak genetics, but by incubation problems. Some are due to genetic problems, but I think they are more the exception then the rule. This past year I produced a kinked bairds rat snake. I've produced dozens and dozens of healthy bairds from this same 1.2 trio of adults over several years and have never had a problem, now that I produced one kinked snake I'm expected to euthanize it (along with it's siblings) because it may have bad genetics? Baloney.... I still have it, I'm raising it up, it's eating and pooping and shedding just fine. Once it gets big enough, I'll probably give it away to some kid who wants a pet snake. I have euthanized snakes in the past that were obviously not going to make it. Some with really severe kinks, body fused together, born with only half a jaw, etc.... Those end up in the freezer. But mild kinks that don't affect the way they live? No. I'm more likely to euthanize non-feeding runts that just waste away to nothing despite my best efforts at getting them to feed.

Mark