This morning I noticed that a point on Mr. Incredible's (our eight-month-old BO cockerel) comb was rather purplish. I had been watching him, with his comb so much taller than the hens and the fact that cocks don't sleep with their heads under their wing (at least, so I have heard while hens are supposed to sleep with their heads under their wings, though I'm not sure ours always do). His comb had been slightly purple the night before, but I was thinking it was probably nothing, as I think he's had little bits of purple before. But is it possibly frostbite? He's having to sleep by himself in a dog kennel in the well house (the coop is in there, too), as the hens were pecking on a cut he had on his comb, and the last couple of nights have had temperatures in the twenties below zero. (The well house stays about 20-40 degrees above zero I guess it might be a little lower during the night, when I'm not there to look at the thermometer) Any thoughts?