I have 4 hens, now in their first winter. Today I noticed that my BO's feather look very thin on the back of her neck. I looked her over more closely, and all around her neck, the feathers appear broken off, also some on her head. Under her wings, her feathers look very thin--there's a fair amount of bare skin exposed, but none of the broken shafts. I have never seen any of the other birds pecking at her. In fact, I have never been able to figure out what the pecking order is. They don't seem to bother each other much. Could she possibly be moulting at this time of year? If so, will she survive the cold weather? If not, and this is a sign the others are pulling her feathers, what should I do? Should I isolate her? I'm afraid she is going to get terribly cold. It was about 13 degrees F last night. Oh, and if I'm posting in the wrong place, please let me know.