I buy whole corn and wheat straight from a friend that farms, for whatever the current market price is, right after harvest, when it is cheapest.
I store it in gravity beds and load into feed sacks as needed to take home from another friends farm, where it is stored.
I get around 8500 ponds of corn and 3500 pounds of wheat at a time.
Some of the feed goes to other animals.
I also feed 38% protein fish pellets and 24% to 28 % game bird pellets or crumbles.
If you have the ability to store it, grains are much cheaper after harvest.
Keith