Hey guys: Look what I did this weekend! Chicken Coop Winter-ization Project (Pre-Winterization) Added Removable Plexiglas over the shuttered vents Before After Those metal brackets turn to hold in and release the Plexiglas. Added Removable wooden Triangle to keep warm air in Before After Added a sliding door to close in the chickens, inside the tower, at night. The old door was just a permanent drafty opening. Before After It frosted this morning. The temp was around 32f degrees. I opened the tower door and stuck my arm in there and it was warm inside. Excellent, Very excellent!