I had 9 of this breed who seemed to be growing and doing well. Yesterday I noticed one lying on the coop floor, which they do often to rest after scratching and wallowing. Later, he had not moved, so I looked inside and he was limp. He was totally emaciated; skin over bone. The crop was flat. The poor thing starved to death! But why was he not eating?? I had not noticed any signs of illness; only 1 seemed to chirp all the time, but I could never see which one it was. Also, in this same brood I have one whose beak is crossed over. He seems to be eating & drinking. He did not have this when I had them in the brooder, or I would have seen it. I have 2 of them isolated now because of pulled feathers from the top of the head. Oh my........PLEASE help me. .