Productive Performance, Carcass Trait and Blood Parameters of Broiler Chickens Fed Different Levels of Dried Whey and Protexin Probiotic

This study was conducted to investigate the effects of different levels of dried whey and protexin probiotic on the productive performance, carcass trait and blood parameters of broiler chickens. In this study, 360, one-day old male and female commercial Ross 308 broiler chickens of mixed gender were used in a randomized design with four treatment (six replicated in each treatment and 15 birds/replicated) and reared on the floor pens for 42 days. The dietary treatments were: (1) control diet (no supplement), (2) basal diet supplemented with 40 g/kg dried whey powder (3) basal diet supplemented with 1g/kg protexin probiotic and (4) basal diet supplemented with 20 g/kg dried whey powder+ 0.5 g/kg protexin probiotic. The results of this study indicated that diet supplementation with dried whey powder and protexin statistically increased chicks body weight at 42 days of age in comparison to the control chicks (p<0.05). The other results showed significant differences in feed intake among control and dried whey powder + protexin treatments. Broilers receiving different levels of dried whey powder and protexin had higher feed intake in compare to the control group. Furthermore, addition of different levels of dried whey and protexin probiotic decreased feed conversion ratio in comparison of control groups. Addition of different levels of dried whey and protexin probiotic increased gizzard, spleen and bursa of fabricius in compersion of control groups. Further result showed that birds received dried whey powder + protexin had lowest total cholestrol, HDL and LDL concentrations in compersion of control groups.