My 12 ducks are 8 weeks old now. Living outside and have free roam on the yard during the day. We are trying to narrow down how much we should be feeding them each day. I think we were over feeding them and have tried to cut back some but now I'm not sure it's enough. They are eating a mix of whole oats and starter grower feed. I'm looking for like oz per bird type of answer.. Please let me know what you think!