We have a free range flock of buffs and khakis on a 1 acre pond. Recently we had a predator attack. In one night we had two ducks mortally injured and one duck killed and defeathered. The mortally injured ducks were able to get away from the attackers but died from their wounds. Here is the real kicker. The duck that was caught and killed was sitting on a nest on a small island. It is pretty dense and she certainly got cornered. Can anyone think of anything besides a dog that would chase down three ducks and cross 10 feet of open water?