I also deeply empathize. Last week it got down to -4 degrees and while my coop is insulated I have vents all around the top. I'm more afraid of them getting poisoned by an unvented coop. We vaselined their combs but it still got them. Four of them, the four with single, floppy combs, got frostbitten. I felt so much like a bad chicken owner I wanted to cry. But I got some Bag Balm, as recommended by someone here, and rubbed it on their combs. It's been warmer this week, 19 degrees or so, but I'm thinking of finding a way to heat the coop with a light. Someone recommended a black light because all it puts out is heat.
Mary
Mary