My 12 week old pullet all of a sudden seems to have hurt her leg. She can run on it if she wants to (like getting away from me!) but then lays down and the leg is basically stretched out in front of her. No marks on it, doesn't appear swollen. I've already separated her which she's not happy with. Not sure what to do from here. Help? I've included this picture that may or may not be of any help.