I have 5 Khaki Campbell Ducklings that will be turning 4 weeks old on Monday. They currently are eating Manna Pro Duck Starter/Grower 22% Protein. I was scared of them getting angel wing, so I mixed in some oats with their feed. They are about done with the 8 pound bag (I bought two of them), and I’m wondering if I should buy another starter/grower, or move them to something else. Fast replies are appreciated because I would like to buy food today, especially if I’m ordering online.