One of my RIRs has a VERY LARGE comb, and for a few weeks I've noticed a few black specks on it. I decided not to worry about it too much because she is acting fine. But today I picked her up to take a closer look. I thought it was dirt, so I tried to wipe it/pick it off. When I picked off an especially large piece at the base, it was like I picked off a scab, and there was a little blood underneath. What are these dots?! Is she sick? Should I buy some medicine for her?