Last two winters I brought them in at night. I tried a heated shed the first winter but they got RI. So I'm wondering if there are any blueprints for heated sheds. I used red floodlights and the shed was built from plywood. I left a small opening for them. And a couple mornings I found them out of the shed in the cold. I'm thinking that is what went wrong. So this time I planned on making a door so they couldn't come out on their own. Just looking for ideas. Thanks!