Of blisters, those containing Cantharides are most effective.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
A blistering compound, composed of mustard, 1 ounce; pulverized Cantharides, one-half ounce; hot water, 4 ounces, well mixed together, may be rubbed in over the loins, along the spine, and back of the head on each side of the neck.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
A Cantharides blister may be applied, or the following ointment used: Biniodid of mercury 1 part, lard 6 parts; mix.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler