I bought 15 chickens in April-May all at the same time, all supposed to be hens. They all grew up together and had no problems at all until about 2 months ago, i went into the chicken coop and one of them was laying on the ground. i tried to get her to move but she couldn't, one of her legs couldnt move and her foot was curled up. two roosters slipped in the bunch, but i believe the injured one is a hen, but not sure what happend to her. We took her to the feed store and they said she could have popped her leg out of socket. We put a splint on her leg and she can walk excellent now, but has an occassional limp. i put her in a seperate cage inside the coop, so the other ones would still see her everyday and i wouldnt have to reintroduce her, so she could heal. A Week later, i put her on the ground with the others, and most of them didnt mind. But there was another hen that just straight up attacks her constantly. i dont if she maybe hurt her in the first place or what, but i seperated the attacker from the rest of the hens. The hurt one does fine mixed with all of the others. Why does that one hen always attack her?