I use to have 4 khaki campbell ducks, but the fox got two. So know I have two a female and a male. This is my first winter with ducks. My ducks keep escaping their in coop, that has a roof, and a chicken run, that I build that has a roof. The female has a nest. The female gets out frequently, and the male gets out sometimes. Their is about 2 inches of snow on the ground. I hear my ducks both the male and the female, and they are in the street. And I find out that their is duck tracks all over my yard. How can I prevent this from happening,what do I do?