I have 34, 1 week old chicks. Within the first few days one chick was injured by the others pecking at it, so I removed it to a separate brooder. This morning I found 2 more injured by pecking and they have been moved to the recuperation brooder as well. What might be causing this? Are they too crowded? I have them in a large livestock water trough. Are they bored? Are they deficient in a vitamin/mineral? Would a red heat bulb help minimize this? Please help. This is my second litter of chicks and have never had this issue before. Thanks!!!