Hello. My Buff Orpington rescue started getting little black spots on his comb a few days ago. At first I thought it was dirt since it had been raining where I live in San Diego. But yesterday the black spots got a little worse and when I woke up to let him out of his coop it was discoloring by the black spots. His diet hasnt changed since we got him over a month ago. Can anyone tell me what this is? He is my favorite boy I don't want anything bad to happen to him. Iv only owned chickens for about a year now so if its something I'm doing wrong please inform me.