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Effect of Chemical and Enzymatic Agents on the Formation of Urinary Calculi in Fattening Steers

United States Department of Agriculture and the Texas Agricultural Experiment Station

Abstract

Using a milo grain, cottonseed meal and sorghum silage ration to fatten weanling steer calves, it was found that the enzyme hyaluronidase, when given in two injections, did not prevent the formation of calculi. Both ammonium chloride and phosphoric acid were effective in reducing stone formation when added to the ration. Substitution of cottonseed hulls for a small portion of the silage in the ration had no effect.

¹ Respectively, Beef Cattle Research Branch, Animal Husbandry Research Division, A.R.S., College Station, Texas; formerly, Western Soil and Water Management Branch, Soil and Water Conservation Research Division, A.R.S., deceased; Western Soil and Water Management Research Branch, Soil and Water Conservation Research Division, A.R.S., Big Spring Field Station, Big Spring, Texas; Department of Animal Husbandry, Texas Agricultural Experiment Station, College Station, Texas; Beef Cattle Research Branch, Animal Husbandry Research Division, A.R.S., Agricultural Research Center, Beltsville, Maryland.