I have 6 Rouens that are 6 to 7 weeks old and are about the size of a full grown wild mallard. They have a nice house inside a 30x30 pen. I live in Michigan and it's still cold her 20s at night and 35 or so during the day maybe 40. The ducks live in our garage now and I put them in a small makeshift pen on the weekends for a couple of hours. When can I move them to their new house? They will be locked in their house at night and let out in the morning. Do I need to leave them access to food and water at night? Is it still to cold out for them to be in their house outside? The bedding in the outside house will be straw it has Windows that can be opened and closed with wire over them. It also has a open area in the gable for a vent that is also coverd in wire. I don't want them to get cold or sick.