My ducks are making a huge mess in the duck house! We're going to put a fence around and above our backyard pond and they would hang out in the pond during the day and then we would put them back in the duck house at night. Is this a good idea? Or will they make the whole pond really dirty and stinky? My pond has dirt under it so would their poop just compose into the soil? Also, any suggestions on how to keep my duck house clean?