One of my 4 week old chicks has something wrong with her leg. When she's sitting on the ground, she has it stretched out straight behind her. I picked her up and examined it closely. The foot feels a little colder than the other and from the knee joint down it is hanging loosely with no resistance or movement on her part when I move it back and forth. Nothing feels broken, no discoloration to the skin. She won't bear any weight on it. I have her isolated in the basement in a separate cage. My best guess is a torn muscle or tendon. Do you think there is any chance it will heal?