The present study aims to evaluate the performance of muscovy ducks (Cairina moschata) bacitracin zinc substituting for natural nutritional complex (mixture of prebiotics, probiotics, organic acids and enzymes) as natural growth promoter. 500 were used for this race muscovy ducks, 250 birds per treatment of both sexes, distributed completely at random, the farm is located in the district of Huanchaco, Trujillo Province, Department of La Libertad, at an altitude of 50msnm. The treatments were: T0: 500 ppm of zinc bacitracin and T1: 3500 ppm of natural nutritional complex. We evaluated weight gain, feed intake, feed conversion, morbidity rate, mortality rate, carcass yield and cost benefit ratio. Each treatment was fed balanced rations according to the nursery stage, which had isoenergetic and isoprotéicos levels. Final weights and increased total weight achieved were not significantly di...