I have 4 chickens, two Buff Orpingtons, one Rhode Island Red, and a Barred Rock. My poor Barred Rock has developed some kind of injury in her leg, and I don't know what to do, or if I can even help her. She was perfectly fine when I first got her. -She is slightly lighter than the other chicks in weight, and she is about 2 months old. -She has been eating and drinking, but she is very inactive. -Her coopmates have been occaisonally stepping on her, but they aren't showing any signs of aggression. -She shows no signs of fatal diseases. Please help!