The Effect of Orally Administered Stilbestrol and Testosterone on Growth and Carcass Composition of Swine

Abstract
Methyl testosterone, at a level of 20 mg. per animal daily, or diethylstilbestrol, at a level of 2 mg. per animal daily, was fed both with and without terramycin in a practical ration to growing and fattening pigs in drylot. The oral administration of these hormones did not improve growth rate or feed efficiency. The feeding of stilbestrol produced clear-cut mammary stimulation in both males and females and enlargement and congestion of the vulva in the female.