I have two young roosters with brown/gray scabs covering their combs, wattles, and faces. One is worse than the other, and one of his eyes is scabbed over. They appear otherwise healthy, eating, crowing, parading about as usual. This caused me to ignore what started out as tiny splotches on their face. I just discovered the one's poor eye this morning, and I'm feeling the worst chicken parent ever. Can anyone tell me what this might be? Any help would be apreciated. I also have 20 chickens living across the yard, but they are all fine.