One of my hens cannot walk on her right leg. It's completely limp. How can I tell if it's broken? And, if it is, can I do anything to heal it? Not sure what happened, but she might be the hen the got into my dog enclosure. She got out too fast for me to tell which hen it actually was, and I don't see any tears or punctures. If it's not a break, what else might have caused this?