My buff orp got frostbite last month, she had damaged/abraded her comb by rubbing her beak back and forth across the hardware clothe while she was in "jail/hospital" and it froze. A few days ago I had her inside to check her out and while looking at her frostbit comb, the blackened portion fell off and the comb underneath was healed up and pink. I'll be putting bag balm on it now as I imagine it is sensitive to the cold. Poor girl. I never have frost on my windows. but when it is 100 percent humidity outside, it is hard to keep the inside below 95. :/ It is a battle against the wetness for sure right now.