Two things come to mind--the starter cannot be medicated as that will kill ducklings, another suggestion is Purina Mazuri feed for Waterfowl --it is great for ducks, geese etc. It has more niacin than Chicken feed. Ducklings have to have water with their feed or water poured over their feed to make a mash. They also need water deep enough to dip their entire bill into down to their nostrils to flush the food and debris away. I hope this helps...