I have hens and we are building a nice huge run that will end up 20x27 feet, and 6 feet high. One half of the run is on top of concrete, and half is on grass. Is it a really stupid idea to add a little pond in one corner on the concrete and add say 2 small ducks in with my hens? Can hens and ducks live togehter without problems? In the winter I would have to give them a heated 16 gallon tub to swim in, so these two ducks would have to be small. If this will not work, it's no problem. I just thought it would be very cute to have a little pond and a couple of ducks. But I cannot build a separate duck pen so they would need to be in with my hens. Any thoughts? Do ducks go to roost at night? Where do they sleep? Will they go inside the coop and sit on the floor in the shavings?