The remaining fiber or bran is mixed with the steep liquor. This product, wet corn gluten feed, contains about 40 percent dry matter. Corn gluten feed should not be confused with corn gluten meal. Corn gluten meal has 2 times the protein content of corn gluten feed. Wet corn gluten feed has some nutritional advantages over dry corn gluten feed but the dry product is easier to handle.
Wet corn gluten feed has a bunk life of a few days in summer and one to two weeks in winter.
Because of bunk life and transportation costs, wet corn gluten feed is only an option to producers that are in relative close proximity of the milling plant. Crude protein values have ranged from 17 percent to 26 percent and fat content has ranges from 1 to 7 percent. Therefore, regular feed testing is recommended or buy corn gluten feed that has a guaranteed analysis. The concentration of crude protein is about as twice as high in corn gluten feed as it is in corn grain. The amino acid content of corn gluten feed is about two times higher than in corn, but relative concentrations of the amino acid are similar.