Link to my post Low Cost Ways to Keep Your Home Warm for more ideas. We got the cars ready for winter- new wiper blades, got out the snow scrapers, added a blanket in the backseat of each car. All those little things in case you get stranded and buried! What I bought this week- more acorn squash, lemons (small amount of pesto to still make), misc stuff.
Again- no down side to being prepared
Dave put the big glass panel on the coop wall back on and added the glass panel to the storm door before the freeze hit. They still have good ventilation through the lower vent and the coop itself is not airtight. There's also a vent in the roof. The main thing with the coop is that you do not want to have too much moisture inside. We also have the upper window that we can open if it gets really warm. Will be adding our exterior extension cord soon, to plug in their water so it won't freeze. It also allows us to turn on a light inside the coop if we have to go out after dark. I decided not to add a light at night to get more egg production. We do use a hardwired-in heat lamp and a reptile ceramic disc for additional heat if it gets really cold. Usually that would be in the teens or lower, but it depends. The good thing about the deep litter method is it actually generates some heat in the winter as it slowly breaks down. We love that method and there's never any odor! We'll add the sunroom soon, the new design worked great last year-