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  • Title: Evaluation of the efficacy and cost-effectiveness of melengestrol acetate in feedlot heifer calves in western Canada.
    Author: Perrett T, Wildman BK, Jim GK, Vogstad AR, Fenton RK, Hannon SJ, Schunicht OC, Abutarbush SM, Booker CW.
    Journal: Vet Ther; 2008; 9(3):223-40. PubMed ID: 19003783.
    Abstract:
    The purpose of this study was to evaluate the relative efficacy and cost-effectiveness of feeding melengestrol acetate (MGA) to feedlot heifer calves in western Canada. Heifers fed MGA had significantly (P less than .05) improved average daily gain, feed conversion, and carcass quality grade and lower rates of initial undifferentiated fever treatment and bovine respiratory disease mortality. However, heifers fed MGA had less desirable (P less than .05) carcass yield grade. There was a net economic advantage of Can $11.31/animal in favor of heifers fed MGA. Based on these results, it is efficacious and cost-effective to feed MGA to heifer calves raised in standard large-pen commercial feedlots in western Canada.
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