There has been constant efforts to increase animal protein intake in Nigeria. The need to provide protein at a low cost to consumers has stimulated continued search for new additives, which will increase the efficiency and growth rate and therefore level of production of poultry birds. This has led to the present use of growth promoters (variously called growth permitters, growth enhancers, biostimulators). Growth promoters are antimicrobials, synthetic agents or mixtures of these. These substances directly or indirectly enhance digestion and hence anabolism. They remove pathological conditions, inhibit the action of organisms causing damages to the intestinal tissues (Robin and Batty, 1986) and therefore cause growth promotion. This study reports the use of a commercial growth promoter recently introduced into the poultry market in Nigeria, on the performance of broilers