Effects of Chlortetracycline, Inedible Animal Fat, Stilbestrol and High and Low Quality Roughage on Performance of Yearling Steers

Abstract

Forty-eight yearling, grade Here-ford steers were allotted to a factorial experiment in which roughages (alfalfa and wheat straw), chlortetracycline, fat and stilbestrol were the variables. Individual feeding these steers for 183 days indicated that chlortetracycline significantly increased rates of gain in rations with alfalfa or wheat straw. Fat increased rates of gain of steers consuming alfalfa but reduced rates of gain of straw-fed steers. Stilbestrol had no significant effect on either rates of gain or on feed required per pound of gain.