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Effects of Administration of Oils and of Penicillin on Incidence and Severity of Bloat and Certain Other Responses of Cattle¹

Iowa State College, Ames

Abstract

A water-dispersible oil markedly reduced the incidence and severity of bloat, even during periods of very severe bloating, when fed at levels of 1 and 2% in the drinking water of Holstein steers grazing alfalfa pasture. The effect was less in feed-lot bloat but incidence and severity also were less. In most instances the animals fed oil had higher average daily weight gains than controls.

Procaine penicillin (75 mg. per animal per day) appeared to reduce bloat when first administered to steers receiving alfalfa soilage. However, later in the season, when the bloat-producing potential of the forage increased sharply, animals fed penicillin had a high incidence and severity of bloat as did the controls. Penicillin feeding apparently had no effect on weight gains. Limited observations were made on the effect on bloat of various oils sprayed on fresh alfalfa soilage. Results indicated that a level of 0.25 lb. of oil per animal per day greatly reduced bloat.

¹ Journal Paper No. J-3282 of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa. Project No. 1267. Supported in part by funds provided by Regional Project NC-27.