I have 8 week? old ducklings. Not sure exactly how old they are. Two came from a farm (no idea what they ate, as all I saw was mud), and one came with a chicken, and chicken food. I put all of them on the chicken food, with a vitamin supplement. I haven't been able to integrate the chicken with my big girls yet, as it isn't big enough, and we have a cockerel. I ferment the chicken food. They get scratch and peck grower food. The ducks are on purina non-medicated starter food, but they literally just ran out. Should I feed them what I feed the girls? They make such a mess of everything and spill half their food, it seems like... and scratch and peck isn't cheap. They are able to forage all day, and are separated from the chickens.