I have a beautiful 5 month old banty rooster. Two weeks ago, I noticed that he had what looked like a scab on both sides of his comb. I thought he had been fighting with his brothers. Now, the "black scab" has grown and the comb around it has gone pale. I have just examined him and the other chickens as they have gone to roost and his comb feels feverish. Also he does not act like he feels well. Help, what should I do??