Hello! I'm hoping one of you more experienced chicken owners can help me. I've only had chickens for about 18 months and this is the first problem we've had (thankfully). One of my hens is almost completely bald on her underside. The skin is red and irritated looking. She is eating and active, but it looks raw and red (the pictures are not as red as she really is). This is her belly not her vent area although the raggedy looking feathers are near her vent. None of the other hens (I have four, total) has this problem. This girl is not at the bottom of the pecking order so I don't think she's being bullied. Any thoughts would be greatly appreciated! TIA!