Hi, I'm in Minnesota as well, it is awful already, extremely cold and damp. This is my first time with chickens as well. I have 6 girls, 3 appear to have frostbite, one pretty bad on her comb (Buff orpington) she injured herself while in "jail" she rubbed her beak and comb back and forth along the hardware cloth and abraded her comb, then it froze I believe

and she possibly has some on her waddle, my gold comet has two points that are frostbit and one of my silver laced wyandottes may have some on her waddle. It is very hard to keep the moisture low inside the coop when like today the humidity was 97 percent, yesterday it was 90, day before that 80 percent. basically my coop mimics what is going on outside. But all of this while being so cold! (except for today) When it was 20 percent outside one day a couple of months ago, it was 20 percent in my coop. I did remove their upper roost tonight so they have to use a lower roost, hopefully this helps. I also had a heated water dish outside in the run, the gold comet and wyandotte seem to duck their whole face in when taking a drink. I removed that and got a tank heater and put their nipple watering pail back in. I'm not sure how that will go in below zero temps though, it has side nipples. I think they are getting their waddles wet and that is what is going on there. I added green house panels on three sides of their run (west, north, and east) the south side is open except for hardware cloth. they spend all day out there, it is not bad in there as it is blocked from the wind. I sit out there alot with them when I can. I'm just at a loss about how you can bring down humidity in a coup when it is 80 percent + outside? I do use sweet PDZ in poop trays under the roost that I scoop out every day. If I go out there at night (like tonight I have to go get one and bring her in to give her medicine) so at 9 i'll clean up under them as well, been doing that for a week. I have wood shavings on the floor which I clean everyday as well. Today was 37 high, tomorrow has a low of -2.

Monday has a high of 7 degrees. It is a total nightmare! I was so excited to get chickens, now I'm nothing but stressed out with constant worry.

I wasn't going to heat the coop as was stated above they are suppose to be able to withstand brutally cold temps, i'm starting to think I may have to heat it.