I put my 4 out at 3 weeks. They are locked overnight in a 3'x6' by about 3' high box built of plywood. I have a heat lamp with a fan on it, mounted in the center, aimed toward one end. It got down to about 40 one night, but the box stayed in the 70's. They have done fine. They just got too big and smelly to keep inside any longer. They are Swedish breed. May not be a popular decision, but it was my best option.
Last edited: