A method for obtaining a lactic permeate supplementary feed for feeding animals and to a product obtained through said method by means of an extrusion process in accordance with certain conditions of pressure, temperature, moisture and time, which starts with the homogeneous milling of the grain to a specific particle size, said flour travelling through a first endless worm onto which steam is injected at a predetermined temperature, going to a second endless worm onto which a first percentage of lactic permeate of 20 % to 40 % is added at a predetermined temperature, entering the extruder at high speed (3 to 7 seconds) increasing the internal temperature and pressure and adding the rest of the lactose at an also predefined temperature； the resulting product passes through holes drilled in a metal matrix and are cut by a series of blades that shape the final product.
