I'm a new chicken mom! My coop came with my new house. I've made some upgrades to the coop among them I added a 1'x1' ventilation hole at the top of the coop with a louvered vent cover. There are also small gaps (not big enough to worry about covering with metal cloth) at eaves of the roof and just generally the coop is not air tight. The coop is about 4' x 5' (not including the brooding boxes) and houses three young chickens. I use pine shavings and remove most of the soiled shavings once a day (once I get a poop board in this will change a bit). As you might know Portland, OR is MOIST all winter long. And though most of the winter is temperate we do on occasion have some cold snaps where it drops below freezing. Does anyone here have any experience raising chickens in the Pacific Northwest? How much should I worry about the moisture? I've got some solid ventilation but It's gonna be moist air moving through. Should I install insulation on the walls for the winter? What are your experiences?