My 4 1/2 month old domestic mallards are finally swimming in the 3 acre pond. I saw them make huge,high circles around it and land on the water. What a sight! Now, I just need to find them a house that they will actually use. Right now, they think the carport and back porch are the bedroom. Considering floating a large dog house on the edge of the pond. 7 ducks. Any suggestions?