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Two experiments were conducted to determine if ractopamine hydrochloride (RAC) could improve nutrient utilization and decrease water utilization, thus reducing the environmental footprint of hog operations. The tissue accretion experiment used comparative slaughter involving 120 barrows (95 ± 3 kg of BW), including 12 assigned to an initial slaughter group; the remaining pigs were slaughtered a...

The study was to investigate the effects of ractopamine (RAC) on the in vitro development of 2-cell mouse embryos. The 2-cell mouse embryos were acquired from Kunming mice. Approximately four hundred embryos were randomly divided into 5 groups: control group (0 μM RAC), low-dose group (0.5 μM RAC), mid-dose group (5 μM RAC), high-dose group (50 μM RAC), and clenbuterol (CLB) group (50 μM CLB, p...

Effects of feeding ractopamine (RAC; 5 mg/kg) to physically castrated (PC) and immunologically castrated (IC) pigs on carcass characteristics, cutting yields, and loin quality were evaluated using 285 carcasses. Male pigs were randomly assigned to sex treatments (PC and IC) at birth and fed the same nursery diets before allotment into 32 pens with 22 pigs per pen in a grow-finish barn. Pigs in ...

The goal of this study was to evaluate the effects of Optaflexx supplementation to steers during the final 28 d of feeding on live and carcass performance. Thirty-four steers were separated into four harvest groups and fed at the University of Florida Beef Teaching Unit. Within each harvest group, the steers were separated into two pens. Both pens were fed a control diet of 85% corn, 7.5% cotto...