Laaser, G.N.Kiracofe, G.H.2011-03-042011-03-042011-03-04http://hdl.handle.net/2097/7908What's Ahead for Cattlemen? is known as Cattlemen’s Day, 1977Eight cull Hereford cows were given 200-mg. injections of testosterone proprionate repository (Haver-Lockhart, Shawnee, KS) every other day for 20 days (10 injections). Four cows were given weekly booster injections with the same testosterone proprionate; the other four were injected every three weeks with testosterone enanthate (sigma Chemical Co., St. Lois, MO.). Each cow was equipped with a chin-ball marker and each was used to detect heat in other cows. The detection period lasted approximately 45 days. Testosterone-treated cows served satisfactorily as heat detectors; those given boosters of testosterone proprionate marked more cows in heat than those given testosterone enanthate.BeefTestosteroneHeat detectionConference paper