This is going to sound so very bad but, our coop doesn't have instulation. It's a plastic shed that you can build, the on that comes in a box. It was for our lawn mower, but we built a better shed, and the old plastic one is now a coop. Anyways, it's really cold at night now, snowed for the last 3 days, and I only have one heat lamp in there. I close all doors and windows, now the one even out to the run. I'm still worried about them. I was wondering if there were any suggestions about how to make it warmer, or will they be fine?