Abstract: This study was conducted to determine the response of Shika Brown cockerels to graded levels of Lablab purpureus beans, processed by boiling in water for 30 min at 100°C. Six isonitrogenous diets with similar caloric levels were formulated to contain lablab seed meal at 0.0, 7.5, 15.0, 22.5, 30.0 and 37.5%, respectively. Diet 1, which had no lablab seeds and served, as the control, was a groundnut cake-maize based chick diet. Each diet served as a treatment and each treatment was replicated three times in a completely randomized design. There were 30 birds per replicate making a total of 540 birds for the study. Feed and water were provided ad libitum. The experiment lasted 8 weeks. The results obtained showed significant (p<0.05) negative responses of the cockerels to dietary levels of lablab. It was observed that there was a significant (p<0.05) decrease in final weight and weight gain as the level of lablab in the diet increased. Feed efficiency was observed to decrease significantly (p>0.05) as the level of lablab in the diet increased. Mortality was not however significantly (p>0.05) affected by feeding lablab in the diet of the cockerels. Feed cost (/bird) and total cost (/bird) were significantly reduced (p<0.05) as the dietary levels of lablab seed increased. Also organ weights and haematological parameters were not significantly (p>0.05) affected by feeding graded dietary levels of cooked Lablab purpureus beans in the diets of Shika brown cockerels.