Twenty-seven Hereford steer calves were divided as equally as possible
into three lots of 9 animals each. One lot received stilbestrol at
the rate of 6 milligrams per head daily for the first 56 days. The rate
was increased to 10 milligrams per head daily for the remainder of the
test. Previous work indicated a lower level for young calves might be
more desirable during the first part of the feeding period. The other
two lots served as controls. Due to lack of pen 'space, they were fed
together. All animals will graze bromegrass pasture without stilbestrol
this summer. After returning to the feed lot, all animals accept one
control lot will receive stilbestrol in the fattening ration.
