I sincerely appreciate the input. Nearly everything I read hinted that frostbite would be darker vs lighter. I had no idea that this could happen even in the 30s. The temps months ago had been in the teens. And as I typed that I just realized they didn't have their big girl combs then! So much...
I didn't think it was cold enough for frostbite, but I can't rule it out. They have been out during much cooler nights and didn't have any effects.
I had also forgotten she was my chick with the white on her earlobes. Related or is that just her?
I am fairly new at this chicken business! Please forgive and correct anything I get wrong. I have 5 pullets that are 5 months old. One just started laying this week! YAY! However, her Coop-mate I just noticed has a little change to the top (back?) of her comb. About 1/3 of it is yellow. I am...