I am in Texas, and I have been working on converting a deer blind into a chicken coop. I have enlarged the windows (doubled their size), and hinged shutters onto the structure. I added roosts above the windows, and I have moved it into the spot I want, and am going to be doing some finishing touches with paint. The structure is 4ft x 4ft, the roof is 6ft at the lowest, and 6.5ft at the highest. There are windows half way up the walls on three sides. They are 16in x 36in, and have shutters that allow them to be opened for summer, and closed for winter. I asked my dad for help adding ventilation at the top, and my neighbor (who I got into keeping chickens) is talking about helping me make an automatic door. They both tell me I do not need to add any more ventilation...but I figure I need to ask the experts. Do I need to add more ventilation? How much? Last year, temps were in the triple digits, and the year before, it was below freezing a few times.