My rooster's combs and wattle have looked funny for a month or so. Recently he has been doing alot of head shaking. Now the comb and bottom edges of the wattles are half black and scabby looking. His feathers don't look great either especially the tail but I wondered if that was just because it's winter. And... About a week ago, I noticed some of the barred rocks had bare spots on their backs just in front of the tail but figured the roo was rough. Tonight, I discovered blackish matted looking feathers near the skin on the buff rocks in the same place. They are loosing feathers there too. All the white rocks and the Ameraucanas look fine. My Stories' Guide to Chickens has a pic of Northern Fowl Mites that looks just like my hens. So, what do I do for that? And is this what is wrong with my rooster? Here's a pic of him that I took 2 days ago. This was him a month ago. Hope you can advice me. The book doesn't say what to do.