My Olive Egger has a bald spot on her head, with an area completely picked clean in the middle of the back of her neck/bottom of her head, then the feathers all raggedy and sparse on the rest of her head and neck. She is also lacking feathers on her throat, where her EE beard was, and her muffs are gone as well. I don't think she is being picked on, because I never see the other 2 pecking at her, and there has been no blood. In another case, my 4th hen is now in the basement, healing, because they had picked her head bloody and tore out flesh. So there is a high probability it could be cannibalism, but no blood? I have been looking for mites and lice but I can never see any, and besides, if she had them, the other chickens would have them as well. She is eating, drinking normally, but her poop is a bit watery and foamy. HELP?