Cornmeal

Corn gluten feed is a by-product from the manufacture of cornstarch and corn syrup. It is a medium protein feed, which contains almost the same Total Digestible Nutrients level as barley. The protein in corn gluten feed is degraded relatively rapidly in the rumen.
Corn gluten feed has medium palatability and may be included in the grain mixture up to a level of 50 percent or fed to cows at a rate of up to 12 pounds (5.4 kg) per cow per day.