I personally saw a representative of Ducks Unlimited carry a tractor full of corn up to a body of water and dump it. This particular body of water had zero ice on it even though it was -10 degrees and all the other places were frozen solid. There was a huge generator there that was heating this pond. I saw it with my own eyes and was going to get a picture but my camera batteries were dead. I also know for a fact that DU stretches out nets on the Missouri line to keep ducks from going further south
