In such cases, give a rectal injection of warm water and an ounce of castor oil shaken up with an ounce of new milk.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In giving rectal injections a rectal syringe may be used, or, better, a piece of one-half to three-quarter inch rubber hose 5 feet long with a tin funnel attached to one end.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It should not be given when rectal tenesmus exists.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera