Texas A&M AgriLife Research, in partnership with the USDA-ARS, conducted an independent feedlot study evaluating the effects of CattlActive® RA — alone and in combination with Monensin® — on carcass value and grade outcomes in finishing beef steers.
The study was conducted at the Texas A&M AgriLife & USDA-ARS Research Feedlot in Bushland, Texas, under approved animal care protocols.
It involved a 168-day finishing trial with 56 British × Continental crossbred steers, sourced from a commercial auction.
Four treatment groups were evaluated:
- Control: no feed additive in the basal finishing diet
- Monensin®: sodium monensin @ 33 mg/kg of dry matter (DM)
- CattlActive® RA: 10 g/head/day CattlActive® RA
- Monensin® + CattlActive® RA: combination of Monensin® and CattlActive® RA
All groups were fed a standardized finishing ration, transitioning from high-roughage to high-concentrate, over the 168-day period. Carcass data were collected and evaluated by trained personnel at the West Texas A&M University Beef Carcass Research Center.