I have a flock of rouens that hatched six ducklings yesterday. The hen rejected one of the ducklings who was a late hatcher. She attacked it multiple times. We removed him from her and have him inside a brooder in the house. He's 24 hours post-hatching now. I went to get some feed for him and the other ducklings but there is no feed available for him and will take at least a week to get some delivered here. I know he needs to eat so gave him some dry oatmeal. He seems fine with it but I wonder if there is something better I can give him until his feed arrives? We are very very rural and our options are extremely limited. The closest major city is 300 miles away.