I have 2 rouen girls that are a bit spoiled. They get to be outside in a large enclosure during the day (or running about the yard if we are out there) and they come into the kitchen at night. They are keen on standing on your feet and begging for peas. We put them in a large tub to sleep in over night. In the morning they go back outside. What I am worried about is the major change in temperature. One moment they are all cozy inside and the next they are outside in REALLY cold weather. I read that rapid temperature changes can be very bad for ducks. Thoughts?