The utilization of medical plants is becoming more popular as a consequence of antibiotic resistance, the need to maintain a healthy environment, and the need to ensure the safety of food. Using a gas chromatography mass spectrometry (GC/MS) instrument, the secondary metabolites in trichilia monadelpha stem bark extract (TMSBE) were analyzed, and a Near Infra-red Spectrophotometer (NIR) kit was used to analyze the experimental diet's proximate components. There were 40 growing New Zealand white x Chinchilla crossbred rabbits of 6-7 weeks age (472.6 ± 6.2 g) were used for the experiment. Rabbits were randomly assigned to 4 groups; each treatment was further divided into 5 replicates consisting of 2 rabbits each. Group 1 (G1): Basal diet with no TMSBE, G2: Basal diet plus 3 mL TMSBE per rabbit/day, G3: Basal diet plus 6 mL TMSBE per rabbit/day and G4: Basal diet plus 9 mL TMSBE per rabbit/day. Experimental diet was formulated to meet the nutrient requirement standards for growing rabbits according to Nutritional Research Council standards (1977). GC/MS analysis of TMSBE revealed that it is abundant in copaene (25.40 %) followed by azulene (18.29 %), δ-cadinene (15.39 %), α-cubebene (10.61 %) and α-long pinene (10.11 %) respectively other compounds were less than 5 %. Average weekly weight gain (AWWG), average weekly feed intake (AWFI) and feed conversion ratio (FCR) were significantly (P˂0.05) different among the treatments. AWWG and AWFI follow similar trend and were highest in G3 and G4, intermediate in G2, lowest in G1 (P˂0.05). Better FCR were recorded among rabbits in G4 compared to the other groups (P˂0.05). Then, it can be concluded that feeding TMSBE at 9 mL/day improved feed intake and enhance performance in rabbits.472.6 ± 6.2 g) were used for the experiment. Rabbits were randomly assigned to 4 groups; each treatment was further divided into 5 replicates consisting of 2 rabbits each. Group 1 (G1): Basal diet with no TMSBE, G2: Basal diet plus 3 mL TMSBE per rabbit/day, G3: Basal diet plus 6 mL TMSBE per rabbit/day and G4: Basal diet plus 9 mL TMSBE per rabbit/day. Experimental diet was formulated to meet the nutrient requirement standards for growing rabbits according to Nutritional Research Council standards (1977). GC/MS analysis of TMSBE revealed that it is abundant in copaene (25.40 %) followed by azulene (18.29 %), δ-cadinene (15.39 %), α-cubebene (10.61 %) and α-long pinene (10.11 %) respectively other compounds were less than 5 %. Average weekly weight gain (AWWG), average weekly feed intake (AWFI) and feed conversion ratio (FCR) were significantly (P˂0.05) different among the treatments. AWWG and AWFI follow similar trend and were highest in G3 and G4, intermediate in G2, lowest in G1 (P˂0.05). Better FCR were recorded among rabbits in G4 compared to the other groups (P˂0.05). Then, it can be concluded that feeding TMSBE at 9 ml/day improved feed intake and enhance performance in rabbits.