A total of 300 day old vencobb broiler chicks of either sex were randomly distributed into five dietary treatment groups with three replicates in each group with 20 chicks. The treatments included the T1 control (basal diet as per BIS 2007); T2 Basal diet + Bacitracin methylene disalicylate @20 gm/ quintal of feed; T3 Basal diet + Cinnamon powder @ 250 gm/ quintal of feed; T4 Basal diet + Synbiotic @ 50 gm /quintal of feed for 7 days and then @ 25 gm/quintal of feed and T5 Basal diet plus the combination of cinnamon and synbiotic. The cost of production calculated at the end of experiment revealed that net profit per bird and benefit cost ratio was found highest in T4 (Rs.62.12) and (1.47) followed by T5, T3, T2 as compared to control. Better economic efficiency was recorded in T4 (203.98 %) as compared to all other treatments and the control respectively. Highest viability was recorded in T4 and T5 (100 %). The European Production Efficiency Factor (EPEF) was greater for the T4 (443.34), T5 (443.28), T3 (414.61) and T2 (326.76) than the control group (300.37). It was concluded that synbiotic was most efficient, effective and economical herbal feed additive and can be use as an alternative to antibiotic growth promoter in broiler industry.
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