I have 3 hens. Two have fairly large combs. Today I noticed that both girls with larger combs have small patchy marks (a sort of light swollen area with some dark marks) toward the back of their combs. It looks the same as the little wounds they get when they're out foraging in the summer, but since they've been oping to spend their days in the run/coop, I'm trying to figure out if it is actually frostbite. In both cases, the rest if the comb is fine and the third hen, with the tiny comb, is completely unscathed. If it is frostbite, should I be putting something on it or should I avoid touching it? Thanks in advance for any advice!