The PECk-O-MATIC Automatic Duck Feeder is weather resistant, shielded from the weather and very efficient for keeping your duck feed with little waste and even less attention. If pellet or wheat constitutes the diet, either the ½ inch or the 5/8 inch regulator disc can be used. When the feed is crumble or milo, the 3/8-inch regulator disc from PECk-O-MATIC Automatic Duck Feeder can be used.