I have been baffled by one of my hens for quite a while now. With winter approaching, I am more concerned for her now. She has had a pale comb and wattles since February or March of this year. Her comb is very pale, almost orangish, and a little droopy. Her feather quality has been declining for quite a while and so I figured she was molting. Now, however, she looks like a drowned rat. She has no under-feathers, the feathers she has are brittle and fall off for no reason I can see. When I can catch her she feels light and in need of some weight. The oddest thing, though, is that she is 100% perky. She eats, roosts, runs around scratching and dust bathing with her flock-mates all day. She does head back to the coop a little earlier in the afternoon than the other hens. Here are her demographics: She is a 3 1/2 year old production red. Free range. Lives with 4 other hens, all of whom are healthy. What I have checked: no mites, stool is normal, does not lay, abdomen feels normal but she seems thin overall Any advice? I am especially worried about what to do with her over winter. I may need a chicken sweater. Here is a photo of her back in June or so. Her comb is paler and you can see the beginnings of her feather problem. She is the red one in the middle...this was in the middle of a hardcore sunbathing session for all the ladies.