Summary and Implications
Utilizing a trace mineral (TM) injection approximately 90 d prior to harvest may improve growth performance and carcass characteristics when the β-agonist Optaflexx is not used. This may provide a unique opportunity for TM injection to be used in natural programs, to avoid the use of β-agonists, but still maintain high rates of growth. However, using a TM-injection only 28 d prior to harvest appears to have no additional benefit, and may decrease carcass quality.
Iowa State University
Genther-Schroeder, Olivia N.; Clark, Christopher A.; and Hansen, Stephanie L.
"Effect of Trace Mineral Injection and Optaflexx on Growth Performance and Carcass Characteristics of Finishing Cattle,"
Animal Industry Report:
AS 661, ASL R2961.
Available at: http://lib.dr.iastate.edu/ans_air/vol661/iss1/24