The effect of stilbestrol implants upon the growth and fattening of romney wether lambs

摘要

Abstract The implantation of 20 mg. of stilbestrol in Romney wether lambs at docking age had only a transient effect on growth rate and no effect on liveweight at killing age. The treatment caused a slight reduction in the “finish“ of lambs. The magnitude of the response obtained was not influenced by the age and weight of lambs at time of implantation or by the use of higher dose rates of stilbestrol. Treatment of lambs with stilbestrol is unlikely to be of any value in fat lamb production in New Zealand.