Cobalt Deficiency in Cattle in the North Eastern Region of Wisconsin

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Abstract
Cobalt deficiency, characterized by unthriftiness and anemia, has been observed in cattle in n.-e. Wisconsin. This deficiency was corrected by feeding salt containing 1 oz. of CoSO4.7H2O per 100 lbs. Incorporation of this salt mixture into the grain at a level of 1% supplied about 3 mg. of elemental Co per day when 5 lbs. of grain were consumed. Good results were also obtained by the daily feeding of one teaspoonful of a soln. made by dissolving one oz. of either cobalt sulfate or cobalt chloride in one gallon of water. The normal range of the Hb level of calves, heifers, and cows was 9.5 to 12.5 g. per 100 ml. of blood. Cattle showed a high tolerance for Co, since as much as 50 mg. of the element per animal per day produced no polycythemia.

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