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Studies on Milk Fever in Dairy Cows¹ I. The Possible Role of Vitamin D in Milk Fever

Ohio Agricultural Experiment Station, Wooster, Ohio

ABSTRACT

1. The feeding of 1 million units of vitamin D daily in the form of irradiated yeast for 4 weeks prior to and one week following parturition did not reduce the incidence of milk fever in an experiment involving 178 parturitions in four breeds of dairy cows.
   
2. The highest incidence of milk fever was observed in Jersey cows.
   
3. Milk fever occurred only in cows with at least two previous parturitions. The percent incidence in mature Jersey cows was found to be equally as high in summer as in winter.
   
4. The irradiated yeast treatment reduced the incidence of milk fever somewhat in Jersey cows which had previous histories of milk fever.
   

Experiments to investigate the effect of feeding larger amounts of vitamin D are in progress.

¹ This work was supported by a grant from Standard Brands Incorporated, 595 Madison Avenue, New York City, to whom the authors herewith extend grateful acknowledgment.

² N. E. Van Demark assisted in obtaining the data from The Ohio State University herd.