Last year my rooster got frostbite on his comb. I'm going to attempt to put pics on here for your reference. Some people mentioned to cut the frostbite off but I didn't do anything except keep him in a coop for the rest of the winter and feed him good. It took several months but he looks fine now. You can't tell he ever had frostbite. His comb isn't as large and detailed but if you never saw him before you would never know. It will turn a yellow color and then black. He is also missing his tail feathers due to a dog attack that happened the previous day. I could tell he didn't feel good but he looks great now. Before Picture With Frostbite Pictures Already healed good while tail feathers were about halfway grown back out. I tried to get pictures through the frostbite cycle After Frostbite Healed. Comb not as big but he's healthy now.