Hello all, My dad has two ducks that he bought this spring. They have spent the summer free ranging. They used to go in at night with the chickens but then they started refusing to go in so they have been sleeping up next to the house. Now that winter is coming, I am worried about them getting too cold. I took the doghouse, that they used to sleep in as ducklings, outside and filled it with straw. There is a small feeder inside the doghouse and the ducks will go in to eat but have yet to sleep in it. Should I be concerned or just leave them be? Thanks!