I have a Black Australorp hen who has been poorly all summer and I'm wondering whether to cull her or try some treatment. She has been listless, ruffled with eye half closed most of the time. She gets up and out with the flock, but just hangs around the food dish and doesn't go out to forage. She's also on the thin side. She walks like an old old lady and now I notice she has swollen cracked areas on her feet. They don't look like the pictures I can find of bumblefoot, but similar in that there are swollen bumps - but no scabs with plugs in them, just infected looking cracks. I thought at first she was just having a difficult molt, but she's finished moulting now and is no better. Her feathers are nice and glossy as new feathers should be, but she always looks a bit rumpled and her tail is always down. Her voice is also odd, a high pitched sort of "hink" sound, like a young rooster makes before they find their adult voice and not at all like normal hen sounds. This makes me wonder if it's a metabolic problem. She has not layed in about six months as far as I can tell.