I built a duck coop down by the pond for the ducks. I personally think it is a nice little box for them. They have food, water, a large pond with many small fish to eat as well as weeds, grass to graze. Two nights in a row they have walked the whole way up from the pond ( about 200 yards) and ended up back at the door of the chicken coop to be let in. How do I get them to stay down there? Should I pen them in better? The chickens keep eating their eggs since they seem to lay them where ever they feel like it and I would like some duck eggs for hatching/ eating..... Suggestion?