One of my Buff Orpington hens has been hanging out in an a nesting box the last few days. Because I'm not the only one to check them, it took me a few days to realize it was the same hen. When I did, I took her out and when I picked her up, I discovered her lower breast and going down her front were bare! She went right to the feed. I'm wondering if she's even been eating. I have expect to find her dead on a visit. What could be going on? Thanks for your help!