Hello, I have one Hen out of 6 that seems to have lost her feathers on her back \ wings. The other hens have not lost any. I assume it is from the rooster, but my daughter is concerned about her with winter coming, so I said I would ask. I will share a picture of her. My question is, is it from the rooster? Why is it only her? And should we worry about her naked skin with winter coming? Thanks for all your help.