The price may seem high in comparison to other commercial feeds designed for production poultry, but wild ducks should be fed a higher quality diet that reflects their feeding in the wild. Mazuri Waterfowl feeds are designed for the wild ducks that we have, with a breeder diet and a maintenance diet (this is for the non-breeding months). The feed is in the form of extruded disk-shaped pellets so you can feed the ducks on the water—it floats and promotes dabbling behavior. We are feeding our ducks with Mazuri feed. Ultimately it comes down to each person's choice as to what they want to feed their ducks, but I prefer a higher quality food for higher end birds. Also, if you have local feed shops/mills that carry Purina feed, see if they can order the feed for you, as it might be a few dollars cheaper per bag.