We've been having a very cold spell (-9 lows, 12 highs). I started putting Vaseline on the combs and waddles yesterday morning and an hour before they went in the coop. This morning I noticed some black areas on their combs and waddles. The black areas are just here and there, not on the edges. I found some bag balm and applied that after lunch today thinking it would help a bit more then Vaseline. While applying it, I noticed a little black on my fingers. I think it rubbed off their waddles. So I'm trying to figure out if this is the beginning of frostbite or dirt that is sticking to their waddles due to all the Vaseline and Bag Balm I'm applying. Their waddles are not stiff. I think we have a bit of a ventilation issue in the coop, so I'm trying to fix that and keep the girls healthy. This is the one girl after having Bag Balm applied. This is the other after having Bag Balm applied. And this is how silly they look once they start scratching again.