Hello! I'm wondering about this whiteness on my Isbar's comb. The whole flock has some scant whiteness but the roosters have it the worst and this Isbar is the worst of them. The hens look more like dry flakiness. They do get good organic feed and barely any treats ( a fifty pound bag of scratch lasts months.) I also add nutribalancer to the feed. Do chickens get dry skin? Is this a fungus? Would teatree oil be irritating this close to the eyes? Thanks for any help.