A selected set of wild herbivores on Lewa Wildlife Conservancy (LWC) and Ol Pejeta Ranch were evaluated for their utility value by productivity indexing based on a computer bio-economic model, Prying Livestock Productivity (PRY). PRY derives productivity of species based on feed energy efficiency (FEE). The respective FEE indices (Kenya shillings, Ksh, per kilogram dry matter, Ksh kg)1 DM) for consumptive use only on LWC and Ol Pejet Ranch for zebra, buffalo, impala, giraffe and eland were 9.23 and 9.20;