I was a little concerned as a new chicken owner, about the cold. My birds seem to be handling things very well. No heat, no insulation in my coop and I'm dealing with the same cold front down here. They're all out in the run today and gave me a good number of eggs. We had a low temp a few weeks ago of 5 and 9 degrees and I've found no signs of trouble. I think my greatest accomplishment has been seeing no frost on my coop windows...EVER, or inside the coop itself. I guess my ventilation system is working well.
Another cold night ahead tonight, a predicted low of 4-5 degrees, possibly 0. I worry about them but I know they'll be fine. My coop by the way with a good amount of litter was 5 degrees warmer than the outside temp this afternoon.
Stay warm.