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Studies on Ketosis in Dairy Cattle. III. Blood and Urinary Acetone Bodies as Related to Age¹

Department of Dairy Industry, Storrs Agricultural Experiment Station, Storrs, Connecticut

ABSTRACT

In the studies of the normal variations of blood and urinary acetone bodies in dairy cattle, experiments were conducted to observe some of the variations in the concentrations of these substances in relation to age. A number of investigators (2, 6, 7) have suggested that rumen digestion may play an important part in the production of the acetone bodies. If the rumen is involved in the production of the acetone bodies, it might be expected that some differences would occur in the production of these substances with the changes that take place in the development of the rumen.

It also appeared that a relationship may exist between the concentration of the blood and urinary acetone bodies and the physiological processes related to production and reproduction.

EXPERIMENTAL

The following three age groups were studied: calves at birth, heifer calves from birth to 10 months of age, and heifers from 9 to 26 months of age.

¹ This project is finance in part by a grant from the Chas. M. Cox. Co.

² The experimental data in this paper are taken from a thesis presented by C. B. Knodt in partial fulfillment of the requirement for the degree of Master of Science in Dairy Industry, University of Connecticut, Agricultural Experiment Station.