Hello, One of my hens has recently lost almost all of her feathers except on her head and a few here and there. She isn't being pecked or harassed by any of my other hens, she just seems to be losing her feathers. She eats, and is acting perfectly normal. All that is left are the little, quill-like ends of the feathers, and the little bit of feather sticking out of them. I'm not sure if this is new feathers growing in or just the end of the feather. Also I just noticed today that one of my other hens has a small patch of missing feather/the spiky ends of the feathers on her chest. Could anyone please tell me whats going on or give me advice on what to do. Thank you.