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A ten-week feeding trial was conducted using 72 Cobb commercial broiler chickens to study the inclusion of oil palm slurry (OPS) in broiler diets. The 1-day-old chickens were randomly allocated in groups of 24 birds to each of the three dietary treatments. The chickens were given conventional feed containing 75 and 150 g kg-1 levels of OPS. The control diet did not contain OPS. Feed and water were supplied ad libitum. Broilers fed on diets with 75 g kg-1 OPS inclusion recorded the highest feed intake, body weight gain, feed conversion efficiency and dressing percentage. The abdominal fat content of carcass showed a significant (P