if you can find it duck starter if not I use an all flock Purina makes a good one called Flock Raiser. If you have to buy chick starter you'll need to supplement with brewers yeast of plain niacin because the chick starter down't have the niacin that ducklings need, When are you getting your ducklings? Niacin dif in ducklings can cause lameness and neurological trouble.What do ducklings eat?