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Effect of Vitamin B₁₂ (A.P.F.) on the Growth of Calves Weaned from Milk at an Early Age^{1, 2,}

Louisiana Agricultural Experiment Station

Abstract

The supplementation of a vitamin B₁₂ concentrate (A.P.F. No. 3) to an all plant-protein calf starter was without effect on the growth of calves to 90 days of age when weaned from milk at 28 days of age. Weekly intra-muscular injections of crystalline vitamin B₁₂ (total of 1 mg.) to one calf after weaning from milk also was of no value. There was no difference in feed efficiency or incidence of scours whether or not A.P.F. was fed.

¹ Presented in part before the American Dairy Science Association Annual Meeting, June 20, 1950, at Ithaca, N. Y.

² The data in this paper were taken in part from a Master's thesis submitted by M. O. Haq to the Graduate School of Louisiana State University, August, 1950.