Under the vent, on her butt, the skin is very red. It is feels rather hard, or tough, to the touch. The feathers sparse and the onese there look bad, ratty, short, broken off. I will get a photo and post later. I have noticed this on her for awhile, but have not looked too closely. I have been noticing one of the other hens is pecking at her behind every so often. I have 4 hens, this is the only one with conditions. Any ideas, suggestions, cures?