Two experiments were carried out to study the relative intakes and performance of sheep fed NaOH-treated straw supplemented with browse or shrub compared with sheep fed urea-treated straw. The shrub or browse used were Securinga virosa, Milletia thonningii, and Delonix regia. The browse/shrub was fed together with NaOH-treated rice straw (STS) (44.2 g NaOH in 118 g water per kg straw) and compared with urea-treated straw (UTS) (75.5 g urea in 434.3 ml water per kg straw). In Experiment 1, significant differences (P