Abstract: Two experiments were conducted with growing goats from July 29 B October 6, 2001 and March 25 - June 11, 2002. Dates include adaptation and digestibility studies periods. In experiment 1, 12 goats with mean pre-experimental body weight of 12.9"0.10 kg and 9-12 m old were randomly divided into two groups and assigned to graze two paddocks of mixed pastures. The paddocks were (A) 65 % guinea grass (Panicum maximum), 25 % peanut weed (Cassia tora) and 10 % Honolulu rose (Clerodendrum philipinum); and (B) 45 % P. maximum, 35 % batiki grass (Ischeamum aristatum), 15 % C. philipinum and 5 % sensitive grass (Mimosa pudica). The paddocks were grazed for 56 d (July 28 B September 22, 2001 for 8 h everyday (0800 - 1600 h). Forage intake of goats in paddock B was higher (P<0.05) than those of goats in paddock A. Growth rate, daily protein intake and FE were better in Paddock A goats than paddock B goats, however the differences were not statistically significant from each other (P>0.05). Digestibility of NFE, OM and energy by goats in paddock A was significantly (P<0.05) higher than goats in paddock B. In experiment 2, 12 goats with pre-experimental body weight of 14.6"0.29 kg and 12-14 m old were randomly divided into three groups. These were used to investigate the effects of concentrate supplementation based on cassava and cocoyam peels on dry matter intake, growth rate and nutrient digestibility of growing goats on a basal diet of guinea grass for 56 d. Concentrate supplementation improved feed intake, growth rate and nutrient utilization of goats above (P<0.05) unsupplemented goats. Goats on cassava peel flour (CaPF) based concentrate were superior in growth rate and nutrients digestibility than those on cocoyam peel flour (CYPF) based concentrate. In conclusion experiment 1 demonstrated that goats could subsist on native guinea grass alone or a mixture of guinea/batiki grasses of medium nutritive quality during the dry season, while experiment 2 elucidated the significance of supplementation on sustainable improved growth rate of goats feeding low quality forage. Supplementation improved performance and nutrient utilization of goats on the native guinea grass.