I think I'm in love with deep litter. I never once have had any odor from the coop, and I've been so paranoid about that. Now that it's been a few months there's a nice layer of bedding, and its warm. Hubby threw straw on top of it all earlier this week. AND come spring I'll have a very nice addition to the compost bin. really though, I can't believe how warm it was inside yesterday when it was only 24 degrees outside. I only have 2 chickens, and only 1 lays. The eggs on these cold mornings haven't frozen, even after several hours, unlike the duck laying outside, her's froze fast.