As Table2 indicates,BWG of broilers receiving diets BS2, Pro,Pre and Syn was higher compared to control group during the growe rperiod(11–28 days),but only
feeding diet Syn increased BWG during the entiretrial period (Po0.05). The FCR of chickens fed any of the diets, except diet BS1, was lower at 11–28 days period compared with controlgroup(Po0.05), but considering the whole experimental period,only chickens fed diets BS2, Pro and Synexhibited an improved FCR(Po0.05). However,differences were not observed in FI among dietary treatments (P40.05).
Carcass percentage,internal organs weight and abdominal fat pad were not influenced by the dietary treatments