A few weeks ago, I noticed that the bottom girl in my flock of four birds was getting furiously attacked by her once friend. She immediately stopped laying, and started sitting around dejectedly, staring blankly. She's gotten thinner since then, and not laying eggs. I've found a few feathers around, but she doesn't look like she's molting. Also, she takes out her anger on me, attacking my shins like a rooster. She has always done this because she likes getting treats and attention from me, but now it's different. She doesn't want to eat treats, and when I pick her up she tries to bite me. She's too afraid to go up on the roost with the other hens and sits uncomfortably on the floor, sometimes coming out of the coop with feces on her. I thought I'd wait a few weeks and see if it wore off, but it hasn't and she sadder every day. I know this isn't really serious, but I always worry about how my hens are feeling, mentally and physically. Can I make her feel better somehow?