You can buy food for fowl other than chickens, but our ducks do great on chick starter and then at 1 month old I switch to Layer mash and cracked corn. They will also eat vegies, lettuce, melons, grapes, cabbage, corn, cucs and alot other items. We give our ducks bread from the day old bakery. they love it and it brings the ducks a running when they hear the plastic bag shake. The ducks grow faster on a high protien mixture like an 18-20 % mixture.