J. Anim Sci.
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J. Anim Sci. 1952. 11:566-571.
© 1952 American Society of Animal Science
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Aureomycin Supplements in Lamb Fattening Rations1

R. M. Jordan

South Dakota Agriculture Experiment Station2

Abstract

Four feeding experiments involving 199 native and western lambs were conducted to study the effects of aureomycin in lamb fattening rations. These lambs were all full fed a basal ration consisting of shelled yellow corn, alfalfa hay and soybean meal. Aureomycin in the form of Aurofac A was incorporated in the soybean meal and fed at levels of 7.2, 10.8 and 14.4 mg. of aureomycin per lamb daily.

The findings of these four separate experiments are summarized:

  1. Aureomycin may be included in lamb fattening rations at levels from 7 to 14 milligrams over a period of 100 days without causing the lambs to go off feed or increasing the incidence of scouring.
  2. Aureomycin in these trials did not stimulate feed consumption to the extent that has been observed in trials with swine. However, in two of the trials it was observed that the aureomycin fed lambs were easier to get on full feed.
  3. Aureomycin fed at the level of 14.4 mg. per lamb daily reduced the rate of gain and feed efficiency in both trials in which it was fed.
  4. At the levels fed in these experiments, aureomycin did not give complete protection from enterotoxemia but it did reduce it materially in experiment IV.

Footnotes

1 A contribution from the Animal Husbandry Department. Approved for publication by the Director of the South Dakota Agriculture Experiment Station. Publication No. 269 of the Journal Series.

2 Aureomycin donated through courtesy of Lederle Laboratories, Pearl River, New York.






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Copyright © 1952 by the American Society of Animal Science.