Thanks. Towels were swapped out with fresh ones (I have them to keep the roosts from being slippery... I should probably find some sort of rubber mat instead.) The main/lower coop seems cozy. The upper coop (addition) seems drafty at the highest roost (not really a roost... a left over steering wheel from the play structure, but the girls like it, so I left it), which is right beside window/vent. Thankfully, they had the sense not to roost there tonight. (I was envisioning frostbite, as my Brown Leghorn is top hen and usually has that spot with her large comb literally right beside the hardware cloth window that seems drafty).