[en] Feeding trials were carried out on-farm to examine the effect of supplementing urea-treated sorghum stover (UTSS) with sesame cake (SC) or fishmeal (FM) on the body weight (BWt) of sheep and cattle. Twenty one male sheep and nine Barka cattle were divided into three groups of seven sheep and three cattle in each trial. The trials were conducted at the same time, but on two different farms. The control diet consisted of UTSS fed ad libitum to both species of animals. The second and third diets were UTSS supplemented daily with SC or FM. The experimental period lasted for 90 d. Feed intakes and BWt were recorded regularly. The dry matter intake (DMI) in sheep was significantly different (P < 0.05) between the control and SC supplemented groups, but not between the other treatments. It was highest for the SC supplemented group at 847 g/head/d followed by the FM supplemented and control groups at 826 and 821 g/head/d., respectively. Sheep supplemented with SC had the highest (P < 0.05) body weight gain (BWtG) (134 g/head/d) followed by the group supplemented with FM (115 g/head/d). The controls had the lowest BWtG (66 g/head/d). In cattle, the group supplemented with SC had the highest (P < 0.05) total DMI (6.13 kg/head/d) followed by animals supplemented with FM (5.81 kg/head/d) and the controls (5.78 kg/head/day), which were not significantly different (P > 0.05) from each other. The BWtG of cattle fed urea-treated sorghum stover alone was 559 g/head/d. This increased to 650 g/head/d with FM and to 741 g/head/d with SC supplementation. In cattle, BWtG was not significantly different (P>0.05) between the treatments. Feed conversion was best on SC followed by FM supplementation in both species (6.92 and 7.70 for sheep and 8.28 and 8.93 for cattle respectively). It can be concluded that feeding UTSS alone or supplemented with small amounts of SC or FM can increase the live weights of cattle and sheep at a reasonable cost. (author)