So yesterday evening I go to feed/water and I find one of my 5 week old RIRs has a patch of missing feathers and what looks like a small sore/scratch in the lower mid area of its back. The first thing I think is that the other 5 week old chicks ( RIR, Delawares & Blue Andalusians ) are pecking it. I spend a good deal of time taking care of my chicks and have never observed this behaviour and have no reason to believe that that is what is happening, but it's what I suspect. Could be that it somehow scratched itself on the wire of the borrowed temporary pen, or something tried to get at it from outside the pen ( we live close to woods and do have possums and coons come into the yard at night ), but just not sure. Anyway ... I brought it in and my wife cleaned the area and we put some antibiotic cream on it to hopefully keep it from getting infected. Is this ok? Do I need to treat it differently? And if it turns out to be pecking is there anything I can do about that? Thanks for the advice.