Seventy-six Polled Hereford and percentage Simmental calves were used
to evaluate Rumensin and drylot vs. pasture systems by average daily gain
of early-weaned (54 day old) calves. Rumensin was fed at 10 g/ton of feed
for 28 days and 20 g/ton thereafter. The starter and standard creep rations
were self-fed to both the drylot and pasture groups.
Drylot calves outgained calves on pearl millet pasture 196 lbs to 140
lbs during the 76-day pasture trial. Rumensin decreased fecal samples containing
coccidial oocytes and improved total gain 5.5% and feed efficiency
4.8%.
