I just realized I'm suppose to add something to Purina Flock Raiser to lower the protein level like rolled oats. I have to get my food at TSC and they are usually sold out of the smaller bags of feed. I only have three duck so I don't want 100 pounds of feed to store. I have a year old pekin duck and two nine week old mallards. The mallards don't really even eat that much at all together they might eat as much as the pekin. I bought a fifty pound bag a month ago and I still have about half left. I can get the oats to add to this bag, but what should I get next? I checked out their website and it seem my choice would be Purina or DuMor. My duck also free range most of the day if that matters, and also get veggies and snacks like mill worms daily.