it is cold here and I just want to make sure I know what to look for just in case. does a comb that has frostbite get black like skin? we don't insulate our coop, have 4 hens, 5-10 months old, no molting...all is well so far but as temp.s hit single digits I am checking daily for signs of stress. it would be really tough to get hold of one of our girls to do the Vaseline thing-she hates to be picked up. But if we must we must.....thanks.