Abstract

The results of four trials in which aureomycin was fed to suckling lambs, and of three trials in which 80 mg. of aureomycin hydrochloride was subcutaneously implanted, are presented. Suckling lambs consuming an average of 4.3, 5.0 and 10.8 mg. of aureomycin per day for 33–50 days showed no digestive disturbances. The average daily gain of the aureomycin-fed lambs exceeded that of the controls by 0.08–0.10 pound in three of the four trials. Statistical analysis failed to show significance, however. Feed per 100 pounds of gain was slightly reduced in the aureomycin-supplemented lots. Aureomycin did not increase feed consumption. Eighty mg. of aureomycin subcutaneously implanted near the forerib of lambs 1–7 days old caused no apparent physiological effects and had no significant effect on rate of gain.

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