My littlest chick, who is around a week old, was fine just 30 mins ago. Well, my sister walked by the chick tub and asked why all the other chicks were laying on her. I went to check and something is wrong with her right leg. She has it hugged close to her and won't stand on it. I moved it around and she doesn't act like it hurts or anything. And she also won't keep her eyes open. Any suggestions? Please don't immediately tell me to cull her. I want to save her, if something is wrong...