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Journal of Dairy Science Vol. 40 No. 7 746-751
© 1957 by American Dairy Science Association ®
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Effect of Feeding Low Levels of Diethylstilbestrol on Established Lactation in Parous Dairy Cows

G. E. Hawkins and K. M. Autrey

Department of Dairy Husbandry, Alabama Polytechnic Institute, Auburn

ABSTRACT

In a study involving 15 lactating cows, feeding diethylstilbestrol at levels of 0, 0.068, and 3.40 {gamma} per lb. of feed did not affect significantly (a) the level of 4% FCM, (b) percentage of NFS in milk, (c) gross efficiency of milk production, (d) changes in body weight of the cows, or (e) efficiency of utilization of available TDN.

The levels of DES fed in this study provided estrogenic activity that is within the range of the estrogenic activity found in forages. Therefore, it is unlikely that the increase in quantity of milk and in NFS in milk, when cows change from dry feeds to succulent young forage, are due to estrogenic activity.






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Copyright © 1957 by the American Dairy Science Association ®.