I have two buffs, two australorps and two americauna. The smaller of the two buff orpingtons looks fine. I guess it could be fighting but it is not just dried blood.
I have 6 chickens that are 16 weeks old now. One of the buff orpington chickens has developed this crusty black grown on its comb and is otherwise healthy appearing. They have a large run and do no fight much. The other chickens do not have this problem. It almost looks like a tumor. What...