NatureServe Duck Starter/Grower with essential oils is a non-medicated feed that offers complete nutrition to meet the demands of healthy, growing ducklings. Prepared as a crumble for balanced nutrition in every bite with no need for supplementation. NatureServe Duck Starter/Grower is specially formulated with essential oils and probiotics to help support immunity and promote digestive health. It is also fortified with all the vitamins, enzymes and minerals needed for healthy growth, strong bones and sound development.