Hello, I have noticed that one of a dozen chickens, which are all 11-12 days old, limps avoiding stepping on the right leg. He spends most of the time sitting in a corner not eating or drinking much. Occasionally gets excited together with the other chicks, but quickly gives up the game after a few limps. He is a bit smaller than the rest of the group (probably, because he avoids walks to the feeder). I could think of a few reasons why this happened: injury, developmental disorder, disease. What I would like to ask is if there is anything I could do beside isolating him from the rest and keeping an eye on him? He also sometimes "yawns" unlike other chicks. He is in the cage with the rest but now separated from them by chicken wire in his own corner with food and water. When inside his compartment he eats and drinks eagerly, but once in a while attempts to join the group trying to push himself through the wire. References and advices are greatly appreciated! Thanks, C.