Hi everybody~ I don't want to seem like a knucklehead here, but I'm having some issues with understanding something. I want to keep my chickens warm this winter, but also understand the importance of proper ventilation. How do I get proper ventilation without having drafts? That just seems impossible to me! Btw, I am a first time owner with 2 four month old Austrolorpe and 3 Barred Rock. My coop is homeade and not like anything else out there! It has two screened windows on each of its four sides and the door is also screened. It also has a curved roof that has a small screened vented area under the soffets on top. Now, all of these windows were fantastic for the summer, but is it too much for the winter? How do I make it warm enough without making it too ammonia-ey inside? We did build covers for all of the windows. And lastly, my coop is not insulated. Is this a big problem? We live outside of Philadelphia with hot summers and moderately cold winters (could get down to 20-30 degrees) Thanks a million for any input! I love my girls!