Have a buff orp that has been acting strange lately. I noticed a while back she won't lay down. Every time I've closed them up, whether still light or in the dark, she is always standing in the corner. She's never roosted with the others anyway. About 3 yrs old. A couple days ago, I noticed when she walks, her steps are slow and her feet are brought up pretty high, like she has something stuck to foot. She will balance on each foot, so it doesn't seem to be a one leg thing. Her underside is pretty bare of feathers, like she was plucked, and her whole underside is wet, dirty and smelly where there are feathers. She has definately lost weight too. She gave me an egg last week for the first time in a couple weeks (none of my four are laying, just figured the time of year). A couple months ago, the others were picking on her, but after putting eye blocks on them, it stopped. They were pecking at top base of tail, which seems to be healed. Any ideas?