Frostbite?

[Euphman06]

This girl is the only one with a bit of white on the ends of her comb. No blackened dead tissue, but it's been like this for a few weeks I'd say. Frostbite or just her coloring? It's been mainly in the mid 30s during the day, 20s at night time. Coop is ventilated well.

 

[Eggcessive]

It looks like it could be some very mild frostbite. Make sure that your coop bedding is dry, and that you have some overhead ventilation to let out excess moisture.