We got a frost last night, the ground was covered this morning, so it was pretty cold during the night. I let 4 my chickens out of their large plastic dog house coop this morning and my SLW roo's comb had black spots on it, spots that weren't there yesterday. Did he get too cold during the night? The chickens insist on sleeping on the floor (which has pine shavings) even though they have a board to roost on. The girls, all with single combs, don't have black spots on their combs... I would think if the cold damaged his comb it would have damaged theirs too. Did one of the girls peck on his comb? Will the spots go away? Other than the spots he seems fine.