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A Report on the Occurrence of Rickets in Calves under Farm Conditions

Department of Dairy Industry, Ohio Agricultural Experiment Station, Wooster, Ohio

ABSTRACT

That growing calves need vitamin D has been established by work carried out at the Pennsylvania (1, 2), Michigan (3), Wisconsin (5) and other experiment stations. Under proper feeding and management practices vitamin D deficiency resulting in rickets in calves is easily prevented. However, unless practices which favor the development of rickets are recognized and avoided, disastrous results may ensue. The increasing number of field cases of rickets in calves which have been reported indicates that improper feeding and management of growing calves occur on farms more than might be expected.

The following report of 9 cases of rickets in Guernsey calves on a farm in Wayne County (Ohio) will help to point out some of the factors involved in rickets developed under farm conditions.

FIELD CASE HISTORY

In late February, 1942, 9 Guernsey calves from 3 to 6 months of age were brought to our attention because of their abnormal appearance and behavior and the failure of one calf with severe symptoms to respond to veterinary treatment.