Steers consuming a free choice mineral mix containing Aureomycin (437 mg
per hd per day) gained 15.3% faster than controls during a 129 day grazing trial
on brome grass pasture. There was considerable variation in daily mineral intake
and daily Aureomycin consumption among the 12 pasture replicates. Worming the
locally produced steers with Tramisol resulted in a small but non-significant
improvement in gain. Two Ectrin fly control ear tags per steer (three pastures
within each mineral treatment for the final 61 days of the trial) resulted in a
0.25 lb daily gain increase. Average horn fly counts for tagged steers was <1 vs.
60 for non-tagged steers.