Abstract: A system for determining and registering the amount of food consumed in a given period of time by each of a plurality of animals, such as cattle, comprising a feed station which the animals can enter individually and separately for feeding purposes. The feed station includes a food hopper mounted on a load sensing means whose output changes as the amount of food in the hopper changes. Means, such as a photo-electric sensing device, are provided to determine the presence of an animal at the feed hopper. The actuation of the photo-electric sensing means will energize a scale weight measuring means which sends a series of pulses corresponding to the weight of food in the hopper to a consumption measuring means. Actuation of the photo-electric sensing means will also energize an interrogation coil which repeatedly sends electromagnetic pulses to the animal to actuate an identification tag attached to the animal. The tag includes a small R.F. transmitter capable of transmitting an R.F.