Young waterfowl require a high level of good quality protein, as they grow quickly. Duck & Goose starter crumbs are ideally sized to allow easy feeding for young birds. Ducklings/goslings will feed off their yolk sac for 24 hours. After that, these crumbs should be fed up to three or four weeks of age, depending on development. Marriage’s Duck & Goose feeds are non-GM and coccidiostat free.