The present invention relates to a feed delivery system in which livestock are supplied with feed from one or more trough feeders. The system includes a feed conveyor for conveying particulate feed to the trough feeders, a plurality of drop tubes extending from the feed conveyor to a position above the trough feeders, and an elevated flow sensor disposed in the path of feed between each drop tube and trough feeder. The flow sensors are adapted to measure the flow rate of feed into each trough feeder upon impact with the flow sensors. The system further includes a means of providing information in connection with individual feeders based on data retrieved from each flow sensor.