Aspects of the present invention include a feedlot bunk calling system comprising a mobile sensor arrangement comprising a ranging sensor unit, for generating a range signal indicative of a distance between the ranging sensor unit and a surface of feed within a feedlot bunk, and a positioning sensor unit, for generating a position signal indicative of a geospatial position of the mobile sensor arrangement. The system further comprises a computing module configured to generate an estimate or indication of an amount of feed in the feedlot bunk, based at least in part on the range signal and the position signal.
