I'm not sure why there aren't any predators....they may well be, but I have never locked any of my ducks up at night....the people I got them from have a TON of ducks, there are TONS in this neighborhood....a lot live free in the creek running behind some houses.....I just never thought of locking them up because no one else does. Never even thought about it until I joined this forum. My eggs did keep getting eaten last year...five nests....but no one in my neighborhood has ever lost any ducks, geese, chickens. I am not saying we don't have ANY, but, like I said, there have been no casualties!
Hope I am not the first.