Abstract: A safety switch for use with a cow trainer has a frame in the form of a sleeve constructed from an electrically insulating material. Slits provided in one end of the sleeve receives a plate portion of an electrically conductive clamp which is engageable with an electrically conductive overhead wire. The clamp is intermittently engaged by a cow trainer supporting electrically conductive contact element slidably mounted on the sleeve and supporting a cow trainer. By proper positioning of a contact bar of the cow trainer over the back of a cow, the cow will contact the bar and will move the contact element into engagement with the clamp whenever the cow humps its back.