This study has investigated the effects of addition ofachillea and butyric acid on performance and serum composition of broiler chickens. In this study that starts 1 day following until 42 days there are four treatments, at first 225 day old broiler chicks were divided to 15 groups of 15 chicks each. Each 3 groups randomly assigned to one of the three treatments. Experimental groups included.G1, control group. G2,butyric acid glycerides (BaBy C4) containing 0.2%.G3,fed by basal diet plus 2 gr/Kg achillea. According to the results,the best result for FCR and weight gain was in G2 also the highest percent of liver and breast was observed in experimental group 3. But the highest level of food intake and the lowest level of abdominal fat were seen in the group 3. Also the serum total cholesterol,, total cholesterol (Chol), triglyceride (TG),HDL,LDL and Glucose were measured in blood samples of day 42.The amount of total Chol, TG and LDL in the serum did showed a significant differences in groups 2 and 3, but HDL and Glucose were not significantly different among groups.
