Powerful purgatives or Diuretics should never be administered to the pregnant cow.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In the latter direction plenty of pure-water Diuretics, and a daily dose of oil of turpentine in milk, or a dose thrice a day of a solution containing one-tenth grain each of biniodid of mercury and iodid of potassium would be indicated.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Extensive applications of Spanish flies to the skin, the abuse of Diuretics, and the occurrence of indigestion and spasms of the bowels are further causes.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler