Being from Northern Michigan, we get some serious cold weather here. We got snow about a week ago, which they already aren't happy about, but I'm worried about them freezing. Daytime temps have been about mid-30's and nights are anywhere from 22 degrees (right now) to the single digits. There isn't electricity out there, and don't want to run an extension all the way out there either (especially with all the horror stories I've read on here about extension cords). Are they going to be fine? I have mostly cold hardy breeds, except maybe my Leghorn and Sebright bantams. Depending on the cost, I could possibly pick up a propane heater that I could run for a couple hours and shut it off before I go to bed? I had chickens as a kid without supplying them with anything extra and remember them being fine. I'm working on the deep litter method, which I'm hoping will generate a little heat, too. Any advice would be appreciated!