Question for duck people... I have a large pond (half acre?) . would my ducks be safe if left to sleep on it at night?? What predators may swim out to get them? and would the ducks startle and swim away at night or will they freeze in the dark like a chicken does?? I am in NC so.. bobcats, coyotes, raccoon, possum... There are no snapping turtles in the pond (knock on wood)