That happened after communal housing and can happen in hatch boxes too if you don't get to them fast enough. (Or so I've heard...)
Any colubrids attacking each other, although probably rare for corns, during handling can easily just be pried off one another. Shoot, things like that happen with breeding kingsnakes! It isn't like they're 18 foot cannibalistic retics... Man, imagine how much fun that'd be though.![]()