Last month I noticed two of my BO hens had some bare bums. I took a closer look and the bums were completely pecked clear but no signs of mites/lice anywhere on them. All of the other feathers looked in tact so thought maybe some bullying at night (no bullying noted during the day) or maybe odd broody behavior. Today I noticed one of the other hens (always the runt) looks a bit ROUGH. Scrappy looking feathers all around her neck and her tail feathers were a bit ragged. I really cant see any parasites on them so not quite sure what's going on. They haven't had a molt yet as far as I've seen so not sure what's goin on here. May have to put a camera in the coop at night to check in on them. It's been frigid temps lately so I'm worried about their recovery. Recommended supplements? Is there something I'm missing? I'll try to get photos later today. Even though the days are shorter all seem to still be laying regularly.