I think she has frostbite. I noticed it today a couple others have some white tips to thier combs and others are showing no signs I have a heat lamp in the coop. If it is frostbite what do I do?
Yep, frostbite. Some folks coat the combs with vaseline to seal out the moisture which freezes and causes frostbite. I have chosen short-combed breeds so as not to worry so much about frostbite.