We bought a house with a nice, big coop in middle Tennessee where the winters are not too bad (very rare snow and temps generally around or slightly below freezing overnight). The coop sits on the back side of a hill where there is a lot of protection from wind, however, it was built like a tobacco barn with spacing between the boards. It's been great through the summer with lots of ventilation, but I'm worried about winter. Should we line the coop inside with plastic or other insulating material? Do we need a heat lamp or other source of heat? The idea scares me as I can just picture my coop up in flames.