Another great thing to check on is with your local Minonites, where I live they grow there grains and harvest, and you can buy for just example: A barrel of corn, barrel of wheat, barrel of what ever, and they have a list of ingredients they can add by the pound, and they will grind, crush, or crack for you here in my area one ton is $345 which is a lot better than buying by the bags from feed store and the combination I use of grains give me a ground feed with 28% protein, I also drive 50 miles one way once a month to a feed store that has Bulk 16 % pellets, I give $10.00 for a hundred pounds, and buy a thousand pounds monthly, it is produced by Southern States, it is actually a cattle blend food, but ducks love it, I give this to my geese because geese don't need alot of protein, it causes them health issues.