This study was conducted to evaluate the effect of different feed additives (Organic acids, Prebiotics and Enzymes) on chicks’ immunity (Antibody titer against Newcastle vaccine, differential leukocyte count, total proteins, albumin and globulin value) and economic efficiency analysis by using production functions for two different broiler breeds. Our results clarified that Indian River (IR) breed showed an increased immunity against NDV than Cobb breed except for organic acid group of Cobb breed. In regard to hemoglobin value prebiotic group of IR breed showed the highest value of hemoglobin. Concerning the differential leukocyte count we found that prebiotic treated group for IR breed recorded the highest value of white blood cells. Enzyme treated group for Cobb breed had the highest value for lymphocyte percentage. Regarding, albumin value, it was the highest for enzyme treated group of IR breed, while globulin value for Cobb and IR breed showed higher value for all treated groups compared with the control group. Our results showed that the effect of these additives on body weight and total return have positive relationship between feed additives and body weight and total return. On the basis of our results, it would be concluded that organic acids, prebiotic and enzymes had positive effect on immunity and economic performance of broilers. |
