Soybean meal is the most important protein source used to feed farm animals. Soybean meal is usually classified for marketing by its crude protein content or by the sum of protein + oil. There are two main categories, the “high-protein” soybean meal with 49-50% of protein + oil and 3% crude fiber, obtained from dehulled seeds, and the “low protein” meal, with 44-46% protein + oil and 6-7% crude fibre, that contain the hulls.