Hello, I have a chicken that has some yellow crusty spots on her wattles and comb. I have 6 other chickens and none of them have these spots, except one, that only has a very small part of the tip of her comb looking yellow. I live in Central NY and the weather for the past month or so has seen extreme cold temperatures, with wind chills -32 somedays. Is this frost bit or scabs from fighting, or something worse like dry fowl pox or favus?

