I have a beautiful Australorp hen that has 3 mo old chicks. She was the best mother but started to peck at them and push them away and she was also laying again so I put her back with the main flock. All was fine for the first week...I only noticed one other hen that was pecking at her. Well, we went out of town overnight this weekend and I came home to a very injured hen. She has a hole in her back and I think even broken bones. She was very weak but I put her back with her babies and she is eating and drinking but hasn't attempted to get up yet. There are 3 roosters in the flock too so I don't know which one attacked her or if it was several. Will I ever be able to put her back with them again? What can I put on the wound? Why would they do this after more than a week back?