Personally, I don't see a problem feeding a snake that just didn't make it, not due to illness but either defects or an unexplained failure to thrive, to another snake - if that snake would normally eat another. I've no doubt that if I put my little tiny female Kingsnake in with my male, she'd be a meal in no time at all. That said, I would never put her in there alive, and if she died, I'd want an autopsy to find out more about what's wrong with her rather than feed her to Tsoss. But feeding off healthy snakes just because they aren't a desirable mutation? Eh... I can sort of see where it is reasonable, rather than have them end up where they'll probably die slowly of neglect, and yet I still don't like it.