I had a rabbits years ago that somehow had got her head caught in the feeder. I have no idea how. But she ended up breaking her neck trying to get out...I am worrier. Every lil thing I think could go wrong I fix or do away with. We also had a nail on board in the chicken coop. Talk about freak accidents. one of the hens got her beak caught and hung her self...how that happened I have know idea!