We built an expanded area for the adult ducks. The bulldozer made digging the 18" deep pond a breeze and the boulder from digging the full pond added to the "look" of the area. The fenced in area is for them during the day and the enclosed area for the evenings. I stopped by a local lawn mower distributor and got the tops of two shipping crates and used them to expand the enclosed area for the ducks (that's the lower enclosed area on the left side of the picture.