I was wondering this as well. Its bad out there. I took every measure but the rooster still got frost bite. Robin (the vet) Is going to lets say= re-shape the wattles and comb. Poor rooster, she will do this next week when she comes out for horse tooth float and early spring shots. She said its everywhere and not just chickens. I had 2 tons of vaseline on him and he looked like a freak with all that goop on him. Robin said, Lynne, smear some vaseline on your fingers and go outside and tell me how it works. Maybe its just me but it felt colder, Like my hands were just wet or something. Its just that bad I guess.
Guess this rooster will sit out the showing and make eggies fertile and thats about it. Hens are all fine.
Roosters locked in with 2 hens let them out for a bit to clean thier pen then right back in, hens run in, rooster rather stay outside, have to herd him in.