A randomized field trial study design was used; 250 cows were randomly
allocated by study entry date into one of two treatments groups: trace mineral
supplemented (TMS) or control. Randomizationwas completed in Excel (Microsoft)
and imported into the farm’s Dairy Comp 305 program (Valley Agricultural Software).
Cows that were randomly assigned to the treatment group received three
injections of 5mL of Multimin 90 at 230 and 260 days of gestation, and 35 days