You can get a loan for breeder males. Line breeding is fairly common among reptiles. As Zombie said, their health isn't effected negatively. Line breeding in balls are mostly used to prove out certain traits or to see if there is a super form of a morph. And actually, line breeding in mammals is fairly common as well. My boyfriend's mother used to breed championship yorkshire terriers. The only accepted way to breed family is father to daughter. Not sure what was wrong with mother son, but apparently more ill effects come out of it? And as a biologist, I'll say that one generation of inbreeding isn't harmful. Even 2 may still be ok. I wouldn't go past that though......and it's not like animals in the wild won't inbreed.
Balls in general have an already good disposition. So they're mainly bred for their paint job. I did hear someone claim their ball came from someone who selectively bred for temperment, but I'm a little skeptical.
I wouldn't euthanize a hatchlings unless it was in severe pain or couldn't eat from a birth defect and such. Otherwise, there is no reason for euthanasia. However, I have heard that some breeders euthanize all normal type balls in their clutches by putting them in freezers. It's a cruel practice in my opinion. Why kill off perfectly healthy animals? Also freezing to death is a painful process...
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