I have 2 ducks and 5 chickens. I recently started keeping the ducks outside all night with the chickens. The chickens all eat out of a hanging metal feeder. But my ducks are not catching on that THAT is where food comes from. I tried putting a bowl under the hanging feeder and then taking it away hoping they might notice that the food is hanging above where the bowl used to be. But they are still not using the feeder. I've also tried lowering the feeder but then my chickens just made a huge mess and ducks hate the mess up off the ground and didn't touch the feeder. How do I teach them to eat out of the feeder?