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The Effects of Feeding Supplemental Copper to Growing Foals

University of California¹

Abstract

The copper content of the blood of foals receiving 8 to 109 p.p.m. of copper in the ration averages about 1.4 gamma per ml. Livers from foals fed the above amounts of copper contained 38 and 359 gamma respectively of copper per gram. Storage of copper when fed at these levels suggests that the copper requirement for growing foals is less than 8 p.p.m. in the ration.

The average red cell count of four Percheron foals was 9,550,000 cells per c.mm. The red cell volume was 35.2 percent and the hemoglobin was 13.37 grams per 100 ml.

The role of additional copper in the etiology of "joint lesions" is not clear and further experimentation will be necessary to determine if it will prevent or decrease the severity of the erosions found on the articular cartilages of horses.

¹ Davis, California.