I had one 4 chicks that hatched late and at first sight were all fine aside from being tired. Next day one had a foot that was mesed up and he wadnt putting it down. While i was at work my wife said all the early birds pecked and attacked hom resulting in his death , now one more of the late bloomers is limping so i put a shoe on him and they start to go after him , i seperated them with fence in the brooder becouse if i put him in a box alone he freaks out. What do i do, and are they killing them for a reason like they know something that i dont know. He starts to freak out and peck at them if they get close to the wire to the point that his beak is looking red as if ot may bleed please help not interested in loosing anouther.