My RIR roo has a place about the size of a dime that has been just like a brownish/blackish/grayish looking stain on his comb for about a week now. Now I'm thinking it was a scab and is now picked/pecked off and I see a sore there. I caught one of the hens pecking it a little just now. What should I do? Put Neosporin on it? Should he be separated from the others for a day or two for it to heal?