Hi all! Went out to the chicken coop this evening and my rooster developed what appears to be a spot of frostbite on his comb within the last few hours. They are in an insulated coop and he did go outside for the first time in a few days for a short time.. but we're in northern Wisconsin and our low for today was -4. He is eating treats - and still mating with the hens so he doesn't feel too bad. Thoughts on what to do now so that it gets better sooner than later?