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A Comparison Of Melengestrol Acetate Fed At Two Dose Levels To Feedlot Heifers, G. E. Sides, J. T. Vasconcelos, R. C. Borg, O. A. Turgeon, W. C. Koers, M. S. Davis, K. Vander Pol, D. J. Weigel, C. M. Tucker
A Comparison Of Melengestrol Acetate Fed At Two Dose Levels To Feedlot Heifers, G. E. Sides, J. T. Vasconcelos, R. C. Borg, O. A. Turgeon, W. C. Koers, M. S. Davis, K. Vander Pol, D. J. Weigel, C. M. Tucker
Panhandle Research and Extension Center
A randomized complete block design was used to compare the effects of feeding melengestrol acetate (MGA) at 0.4 (0.4M) and 0.5 (0.5M) mg/d per head on feedlot performance, estrus activity, and carcass characteristics of commercial beef heifers (n = 1,418; 10 pens/ treatment). Within 48 h of arrival at the research site, heifers were assigned to treatment, processed according to feedlot protocol, and administered an abortifacient. After adaptation to a 95% concentrate diet, MGA was supplied at either 0.4 or 0.5 mg/head daily. Estrus activity was monitored twice daily and summarized as a count of heifers showing estrus within a …