Hello everyone ! I want to introduce myself and my family.. These are my kids, 3 mallard ducks, 8 months old. We live in Pennsylvania, the winters are pretty cold , and wet. We decided to build a kennel around the pond, since my ducks spend pretty much all their time there. It is completely closed in, even the roof has the 2 inch fencing, so my babies can enjoy their life, with out having to worry about anything geting them.. My only question is, are they smart enough when they get cold, to go into their house to get warm? I put their food in the house, so it stays dry, and at least when it gets cold out side, they can come in and get warm. Do I have to still lock them in their house at night as it gets colder outside? Hope you like the pics.