We started out with about 50 Isa's. Once we moved them to a bigger brooder, they have been killing eachother. We've lost about 6 so far. Apparently they will go up and pluck feathers from the vent area of an unsuspecting victim and then it will bleed. Once it starts bleeding then the others follow suit and start pecking. I can't imagine they're cramped and they have access to food all day. Any suggestions on what I can do?