Soybean Meal is the standard to which other protein sources are compared, and is a by-product of soybean oil extraction. Protein , fiber, and fat levels all vary with the process by which the oil is extracted. Soybean Meal is a highly palatable source of protein, and used often as the dominant source of protein in the rations of most farm animals, including ruminants, pigs, poultry, and aquaculture.