Several years ago my wife and I bought a small farm that was in her family. Anyway there was a regular barn, a milk house and a chicken coop. The chicken coop ended up being storage. I thought I should start raising chickens for eggs so I cleaned the coop out and now have raised14 chicks ready to start laying any day now, 3 chicks that are 3 weeks old and just bought 12 more to be picked up in 2 weeks. My question is on the coop I have 2 of the wind direction revolving fresh air/vents. Should I seal them in the winter? I'm northern Ohio and it does get pretty cold here for a good month or so. Also should they have a screen on them to keep things out? Thanks for letting me join in the Backyard Chicken forum!!