Today when I went out to our chicken coop, there was one of our hens huddling in the corner, I was sure she was dead because she wasn't moving, so I tried to pull her out, but the second I touched her she jumped up and started running away. The second she got her head out of the corner the rest of the chickens started chasing her and pecking her on the head and all over! She then ran to the other corner and stuck her head in it. The thing is, is that she has a cut around her crown, so my sister thinks it was cut, not pecked, and it almost looks like it was cut with a knife, but she thinks that maybe a predator got in, or something. A few weeks ago one of our chickens got stuck behind our feeder, and when we found her, she couldn't walk, her legs were stiff, and she died that night. We think maybe the same thing happened? what do you think? I don't know what to do about it!