All birds were offered corn soybean diets supplemented with Cr 3 at 0, 0.10, 0.15, 0.20, 0.25 or 0.30 mg kg. Dietary inclusion of Cr 3 at various levels yielded significantly better growth performance and organ index in birds. Similarly, antibody titre against Newcastle disease and avian influenza H5 at various ages was found to be significantly higher in birds that received 0.15 mg kg Cr 3 in the diet. ...