Okay, I'm tired of trying to figure this one out alone. I have 5 adult chickens. 1 Bantam White Cochin Roo (he was nearly bald when we got him, so not sure of his age) 1 Bantam Wellsummer Hen (she is three or four) 1 Barred Rock Hen (6 months old, from a random asst at TSC) 1 Black Australorp Roo (same as the barred rock hen) 1 Mystery Roo (same as the barred rock hen) All of them except for my wellsummer hen are skinny. I mean, their breast bone is sticking out they are so skinny. I've moved them back to grower feed, oyster shell is free choice, plenty of rocks for digestion (I don't have a lot of dirt, mostly rocks where I live), and I am mixing a 10 lb bag of black oil sunflower seeds into their 25 lb bag of feed. They have acv in their water and plenty of stuff to munch on besides the feed (vegetable scraps, and any starch scraps). They are in their coop at night and roam the yard during the day. The white cochin is on a tie out and sleeps alone in his own shelter because he's a butthead. Attacks everyone who goes near him, people and chickens alike. The two younger roos have a limp on one foot that I can't figure out the cause of. There isn't any swelling that I can see, no injuries that I can see or feel, and I don't see any evidence of scale mites. The only thing I haven't done that I can think of, is to deworm them. I just don't know what to deworm with since I don't see worms in their poos. And we have plenty of healthy poops. All over the place. We don't have runny noses, impacted crops (let their crops empty to make sure, they were not happy with me that day), I don't see any strange behaviors. This isn't a dire emergency as they don't seem to be lethargic, they have plenty of energy as far as I can tell. Their combs are nicely colored and wattles as well. If you need more information please let me know.