Abstract: This study investigated growth performance of guinea fowl fed diets containing 3 cereal grains as energy sources in comparison to commercial broiler diets. Birds were raised under intensive system from 3 to 16 weeks of age. A completely randomized design was used where 160 keets were randomly assigned to 4 dietary treatments. Each treatment had 40 birds with 4 replicates of 10 birds each. Data were analyzed using General Linear Model Procedure of Statistical Analysis Software (version 9.0). The results showed that dietary treatment did not (P>0.05) influence body length, body circumference, wing stretch, shank length and neck length of guinea fowl. From 3 to 16 weeks of age feed intake was significantly (P<0.0001) lower for control diet (13714.79±209.65 g) than maize (16085±209.65 g), millet (1609.63±209.65 g) and sorghum (15872±209.65 g) diets. Furthermore, FCR was significantly (P<0.0001) lower on control diet (11.33±0.37) than maize (13.91±0.37), millet (14.90±0.37) and sorghum (13.72±0.37) diets. Average weekly body weight gain was significantly (P<0.05) lower for birds on millet diet (82.98±2.18 g) than birds on control (93.14±2.18 g), maize (89.25±2.18 g) and sorghum (89.03±2.18 g) diets. These results suggest that cereal grains can be used in guinea fowl diets without affecting performance.