Yep I am also in the 10 to 20 below forcast for the next few days. Brrrrr I will be putting down some extra hay.
My chickens stay huddled together on the roosts when it's this cold. I have yet to have and frostbitten feet. As for frozen combs, the one roo that has bad frostbite is the mistery mutt that came with our chicks, he may not make it to see next winter if he keeps up is additude, I defently won't be keeping any other roosters with large combs over winter. I most likly will not be overwintering again my ISA brown girls either, they can't handle the weather here, and dont lay much, even in the summer, plus I want to get some birds I know will brood, and I won't overwinter more than 20 chickens.