I have 3 Rouen ducks and boy, now that Spring is here they will wander back to the pond and not come back up at night. I finally caught them one morning and have them penned up in the chicken yard. Boy, are they ever mad! But, I want to be able to collect the eggs and not have them attacked by coyotes-my uncle shot one going after our calves a few days ago :-( So, you might have to keep them penned. I love to have my birds free range, but their safety comes first.