The objective of this study was conducted to evaluate the effects of Yogurt and Probiotic on performance and serum composition of broiler chickens. In this study that started 1 day following until 42 days. At first 225 one day old broiler chicks were divided to15 groups of 15 chicks each. Each 3 groups randomly assigned to one of the 3 treatments. Experimental groups included T1, control group, T2,basal diet containing 1% probiotic(L. acidophilus and L. casei)1-28, T3, was fed by basal diet plus 5 gr/Kg Yogurt. As compared to the control group with the other groups observably to give improve performance in all of the experimental (P<0.05). According to the results, total cholesterol (Chol), triglyceride (TG),HDL,and LDL were measured in blood samples of day 42. The amount of total Chol and triglyceride (TG) in the serum did showed a significant differences, but HDL was not significantly different amoung groups.
