The Swedish Blue is a breed of domesticated duck which emerged during the 19th century in Swedish Pomerania. The PECk-O-MATIC Automatic Duck Feeder helps combat the wastage of feed that used to happen with traditional feeding methods. The ½ inch regulator disc can be used for pellet, wheat, cracked corn, peas and barley. When the feed is crumble or milo, the 3/8-inch regulator disc from PECk-O-MATIC Automatic Duck Feeder can be used.