I have a hen that started limping earlier this week. I had to separate her to keep the rooster off her. I can't find anything wrong with her leg, no cut, abcess, I stretched it out and she didn't seem to mind. She won't put any weight on it but will leave it down to balance herself. What else should I do or look for? She is eating and drinking well. No eggs though, previously she was laying regularly. Any ideas?? thanks