I have a 3 year old barred rock with comb that looks just like this! I tried to take a picture of her, but this image on backyard chickens is much better (thank you!) The scabs are black, not really raised or colored around the edges at all like other picture images I've seen. If it was just the tips, I'd be figuring she somehow got frostbite. They bleed really easily... My coop is like a crime scene! I thought at first this was damage from "discipline" from the other hens (she is low girl in my flock of 5), but it came out of nowhere and frankly I do not see enough abuse to cause this. So I'm thinking pox, but it's not exactly mosquito season, she's the only infected one (we're about 3 weeks into this), not acting sick and eating and laying great. It's also just her comb, not the rest of her face) just wondered if anyone else can confirm this is the look of "dry" pox; I'd hate to find out it was a different kind of infection that I should have treated. As it is, I have applied blukote once and tonight smeared her with antibiotic ointment.