A process for preparing a feed supplement composition for ruminants, comprising the following steps: (a) heat treating cleaned grains at temperatures ranging from 80.degree. F. to 350.degree. F., for 30 to 120 seconds; (b) transporting the heat treated grains to a vented steeping tank, through a flow control system; (c) combining the heat treated grains with a nitrogenous compound, in the vented steeping tank, using a dosage ranging from 10 kg to 100 kg of nitrogenous compound/tonne of grains; (d) allowing cool air to enter the steeping tank transforming portions of the liquid nitrogenous compound into steam; (e) allowing the steam to flow upwards in the steeping tank; (f) steeping a mass flow of the heat treated grains combined with a mixture of steam and liquid solution of the nitrogenous compound, at a controlled flowrate with an infeed temperature ranging from 100-310.degree. F. and an outfeed temperature ranging from 90-280.degree. F.; (g) allowing the steam to exit the steeping tank; (h) crushing the heat treated grains infused with the nitrogenous compound; (i) cooling the steeped grains combined with the nitrogenous compound, to an outfeed temperature ranging from 180.degree. F. to 190.degree. F., the infeed temperature being higher than the outfeed temperature; (j) optionally spraying the nitrogenous compound, over the heat treated grains, during the cooling step, using a dosage ranging from 10 kg to 100 kg of nitrogenous compound/tonne of grains; and (k) recovering the feed composition. A feed supplement composition for ruminants, obtained through the above described process.