Three weeks ago we brought home (8-10 wk/old) chicks. We have kept them separate from the already exisiting flock. One on the new chicks (an Orpington) has a minor case of bumblefoot, and is being treated for it. He also has been laying down quite a bit, but otherwise eating and drinking normally. I can not for the life of me figure out what is wrong with him, but I know there is something else. I just went outside to let my exisiting flock out to play, and one of my Barred Rocks is lifeless. Her comb and wattles are turning yellow, and her breathing is very shallow. I don't know what to do! Is this something that she caught from the new birds? This is my first time doing this, and I'm worried I'll lose my whole flock because we decided to introduce more chickens into the flock. How do I treat her? What do I do? I feel so helpless. If anyone has any advice it would be greatly appreciated.