Materials and Methods: A total of 240 day-old Hubbard broiler chicks were reared in 8 groups with 3 replicates per group, comprising 10 birds in each replicate. The dietary treatment groups comprised of basal diet A (positive control, 2730 kcal/kg), low energy diet B (negative control, 2630 kcal/kg), diet C containing low energy diet plus 0.25 g/kg enzyme, diet D containing low energy diet plus 0.5 mg/kg enzyme, diet E containing low energy diet plus 0.5% citric acid, diet F containing low energy diet plus 1.5% citric acid, diet G containing low energy diet plus 0.25 g/kg enzyme plus 0.5% citric acid and diet H having low energy diet plus 0.5 g/kg enzyme plus 1.5% citric acid were offered to different groups of broiler.

Results: Results showed improved weight gain throughout the experiment (P<0.05) in groups D, G and H groups as compared to B while non-significant (P>0.05) as compared to A. Feed consumption was reduced (P<0.05) in all groups as compared to B while D and G was equal to A in feed consumption (P>0.05). Feed conversion ratio (FCR) was observed better (P<0.05) in D and H while M.E was non-significant (P>0.05) in all groups. Blood glucose level was observed higher (P<0.05) in D, G and H.

Conclusion: It may be stated that enzyme supplementation improves performance in broiler fed low energy diet while organic acid supplementation in low caloric diet has no pronounced effect on performance.