While there are many published models for predicting liveweight gain of cattle, none are appropriate for many of the feedstuffs commonly used by Indonesian smallholders or could be confidently applied to Bali cattle, which are small in comparison to European breeds with estimates of mature weight of females ranging from 250–350 kg/head and males up to 450 kg/head (Devendra et al., 1973, McCool, 1992 and Sukarini et al., 2000).