Back to our regularly scheduled program... OP, you don't need to heat that little coop with your warm winter temperatures. I would suggest figuring out some way to add ventilation to it, though, because frostbite can occur in relatively warm temps (Above 0, and maybe even into the teens and 20's) if there is too much moisture in the coop. When I first started raising chickens, I thought the coop needed to be closed up tight and heated throughout the winter. I had frost bite and respiratory problems every winter. Then I read about ventilation in the coops. Now, I'm in MN where it can regularly and for days at a time be in the teens and 20's below zero, and occasionally hit the -30's. I thought those people were crazy. I was wrong. Now I leave the windows out of the coop until it's regularly down to the teens day and night, and the pop door stays open (I have an attached run that's fairly secure) until it's double digits below zero. The soffits are vented so the warm, moist air can escape.
