Weight Gain and Carcass Yield with Monensin

The aim of this research study was to quantify the effects on weight gain and carcass yield of cattle fed a conventional feedlot finisher ration containing Monensin, with that of cattle fed a diet containing ProAgni’s ProTect C feed additive. The study was conducted in collaboration with The Midfield Group under commercial feedlot conditions with an accelerated, eight-day induction period onto a full-grain ration.


A total of 240 cattle, consisting of 120 beef steers and 120 Friesian bulls, were fed for an average of 92 days. Cattle were allocated to the Control-Monensin group beef steers, Control-Monensin group Friesian bulls, or TreatmentProTect C group beef steers, and Treatment-ProTect C group Friesian bulls. All cattle were transitioned onto a full-grain diet over eight days.

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