PMI Nutrition International Mazuri® Waterfowl MaintenanceChoose the waterfowl food used by zoo professionals to care for your flock. Mazuri Waterfowl Maintenance Diet is designed to provide quality nutrition for ornamental ducks, geese, swans and other waterfowl species. Your birds will get all the vitamins and minerals they need with no supplementation required and you can use the diet as a base to design a complete feeding program for herbivorous or omnivorous ducks.