I hatched some chicks about a month ago. Last week I went to feed them and I found one lying on its back. I thought, at first, that it was dead but when I approached it, it started to flop around and try to get up. I picked it up and turned it over and then it flopped around trying to walk. I realized that it obviously had something wrong with a leg but I don't know what the problem is or what caused it. All of the other chicks are doing great. Now, every time I check on them, it is on it's back and can't get turned over or upright. What should I do? I can't stand the thought of killing it because it seems to have such a strong will to live. I feel so sad and want to cry every time I see it like that.