A system and method are provided for administering micro-ingredient feed additives or supplements to feed rations. The amount of each particular micro-ingredient to be delivered to a feed ration may be determined by a bulk density measurement. Alternatively, bulk density measurement may be used in combination with existing weight measurement and volumetric metering methods for multiple micro-ingredients. Delivery by bulk density requires determination of a bulk density value along with use of a dispensing device that dispenses a calculated amount of the micro-ingredient ration. The dispensing calculation may be achieved by analysis of delivery time, pulse count, or some other quantitative measure such as magnitude. Use of bulk density as a measurement technique eliminates the requirement for use of scales in the micro-ingredient delivery system.