My wonderful amazing super deluxe rooster Harvey has been through many illnesses. I almost lost him twice before, but with constant nursing and antibiotics he survived. I am noticing that his comb is turning black. It's more noticeable when you look at the right side. I know this can be from lack of circulation. Is there anything I can do for Harvey to stop this? He acts the same as always, he's the perfect gentleman with the girls and with me. I don't want to loose him, help! He is three years old, I NEVER give the chickens corn, just grains, greens and yogurt, and that not everyday, maybe once a week. A year ago I switched to "all flock" feed, but it was discontinued so I had to go back to layer feed. What do y'all think???? Sorry, the photos are a little blurry. But you can see what I'm talking about.