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Sexual Development of Range Ewe Lambs as Affected by Winter Feeding

Utah Agricultural Experiment Station and United States Department of Agriculture

Abstract

Results of a study of the effects of lot-feeding of range ewe lambs during their first winter indicate that the reproductive tract develops more fully, as compared with development in ewe lambs maintained on open range. These results, coupled with earlier work in which larger lamb crops were produced at two years of age as a result of lot-feeding during the first winter, indicate the desirability of giving special attention to the feeding of ewe lambs in range flocks. Problems needing further attention, to determine how far the rancher can afford to go in giving special attention to his ewe lambs, are outlined.

^₁ This work was conducted at the Utah Agricultural Experiment Station. The authors are indebted to Dr. George Stewart and Selar S. Hutchings of the Intermountain Forest and Range Experiment Station, U. S. Forest Service, Ogden, Utah, for helpful cooperation in the phase of this work conducted at the Desert Range Station, near Milord, Utah.