Pow-Wows, or Long Lost Friend, by John George Hoffman, [1820], at sacred-texts.com
A VERY GOOD REMEDY TO DESTROY BOTS OR WORMS IN HORSES.
You must mention the name of the horse, and say: "If you have any worms, I will catch you by the forehead. If they be white, brown or red, they shall and must now all be dead." You must shake the head of the horse three times, and pass your hand over his back three times to and fro. + + +