Hi, I went to the coop a few days ago and there were feathers everywhere. They had come off one of my three Red Stars, who is two years old. At first I thought the other chickens were pecking her but today all her leg feathers are gone and it looks like underneath feathers as well. She is running around eating and pooping and drinking normally but I worry about her condition/sickness and that she will freeze (it's snowing now) because so much of her skin is showing. The coop was clean when this happened and I cleaned it out again and put in all new straw. Thanks for any advice.