Only 85-90% of the grain-fed cattle are kept in the pasture. When they reach a certain weight or age, they are transferred to the feedlot for fattening. The main grains used during the grain feeding period are wheat, barley, sorghum, and black wheat. At the same time, lupine, purple pea, cottonseed or rapeseed by-products, as well as silage or hay, are used to provide cattle with the protein, carbohydrate, fat and crude fiber needed for growth.