Evaluation of Renergy on Finishing Steer Growth Performance, Carcass Traits, and Liver Abscess Prevalence and Severity

Summary with Implications A feedlot study evaluated the effects of Renergy™ (Selko USA) and Rumensin® (Elanco Animal Health) on growth performance, carcass traits, and liver abscess severity in finishing beef cattle. Using a 2 × 2 factorial design, cattle were fed one of four diets: control (no additive), Renergy, Rumensin, or both additives combined. A significant interaction between Renergy and Rumensin was observed for feed conversion, with a tendency for interaction in dry matter intake (DMI). Cattle fed Renergy tended to have lower DMI and lower average daily gain, though DMI did not differ between cattle fed both additives and those fed no additives. Rumensin had no effect on cattle performance. Neither additive influenced liver abscess incidence or severity. These results suggest that Renergy and Rumensin impacted feed efficiency and carcass traits without affecting liver health, with Renergy reducing intake and gain, and Rumensin having more notable effects on carcass composition.