I live in MN, too. I don't insulate or heat my coops, and my chickens are doing just fine. They acclimate to the cold. They have their own down coats so to speak, that they can't take off when they go inside.I live in Minnesota where temperatures at this time of year can get down to -30 degrees Fahrenheit. I am going to get chickens in the spring and I was wondering if anyone takes their chickens inside when it gets too cold. Also do you recommend insulating or not insulating, I have some spare insulation, but I'm not sure if it is needed or not.