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Cod-Liver Oil Tolerance in Calves

Laboratory of Animal Nutrition, Cornell University, Ithaca, N. Y.

ABSTRACT

Dairy calves were reared from birth to six or nine months of age on skimmilk, hay, and grain, supplemented with cod-liver oil at different levels, ranging up to 0.7 gram per kilo. No evidence was obtained that the oil affected adversely the growth or physical condition. On killing the animals for post-mortem study, no gross changes indicative of cod-liver oil injury were found. On histological examination of various muscles, slight dystrophic changes were found in some of the animals, primarily in those fed the higher levels; but the lesions were of a very minor character, in marked contrast to previous findings with other herbivora. The results suggest that cod-liver oil can be fed to dairy calves in the amount that may be required to supply vitamin D without any significant injury.