Abstract
Abstract Extract In the course of some earlier experiments, it was observed that vitamin B12 deficiency in 2 hoggets was corrected by injection of hydroxocobalamin (vitamin B12b) (E. D. Andrews, pers. comm., 1972). Since this form of therapy offered a convenient and effective means of treating young lambs suffering from vitamin B12 deficiency, more detailed investigations were desirable. It has been known for some time that lambs on the cobalt-deficient area at the Ministry of Agriculture and Fisheries Kaitoke Farm lose condition after weaning. Abnormal amounts of methylmalonic acid (MMA) had been found in the urine of some of these lambs, indicating a state of vitamin B12 deficiency Andrews et al, (1970 Andrews, E. D., Hogan, K. G., Stephenson, B. J., White, D. A. and Elliott, D. C. 1970. Cobalt and thiabendazole live-weight responses in grazing sheep, and their relation to the urinary excretion of methylmalonic acid. N.Z. Jl agric. Res., 13: 950–965. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]).
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