Vol. 9, Special Issue 6, Part F (2025)

This study aimed to evaluate the growth traits and feed efficiency are affected by different energy-protein ratios in Cobb chickens that are raised in hot conditions, using a polyherbal feed premix during the summer. Randomly, 300-day-old male and female chicks were divided into five identical groups, with a control group having the recommended CP and ME levels without any supplementation and the other four treatment groups, viz., TP2, TP4, TP6, and TP8, with CP levels at 2%, 4%, 6%, and 8% reduction, respectively, with Superliv polyherbal concentrate feed premix supplementation. We reared the birds in a deep litter system under standard and identical management and environmental conditions during the tropical summer months. Superliv supplementation in broiler chickens at 500 g per tonne of feed from 0 to 42 days of age resulted in significantly higher average body weights when crude protein was reduced to a 4% level. The liver tonic-treated groups' liveability was also higher in the TP2 and TP4 groups. Based on body weight at the sixth week and FCR, CP in the ration can be reduced to a 6% level safely without any detrimental effect with superliv supplementation. The efficacy of the Superliv Herbal liver tonic concentrate feed premix was greater, achieving up to a 4% reduction in crude protein (CP). It can be said that adding Superliv Herbal liver tonic feed premix helped greatly improve the overall growth, feed efficiency, and higher production of broilers.