My ducks rarely go into their pen at night. Our chickens B-line for home once dusk comes round, but the ducks are chillin' in the yard til I walk them over to their pen. It's not hard and they'll walk right in a nice little pod of white, but I do have to bring them there at night. And we always feed our ducks at night,so they know a meal's coming--they just don't care when it comes.