The May 1939 issue of Radio Retailing offered some advice for radio men thinking of diversifying their business–the electric fence.  The magazine pointed out that a fence needs to be “pig tight, horse high, and bull strong,” but that this ideal has never been fully arrived at.  But a small electrical jolt will encourage all animals to shun the fence completely, at a much lower cost.

The article noted that the concept of an electric fence was fairly new, and that a Wisconsin survey showed that only about ten percent of the farmers in that state were employing them.  Many states had adopted regulations prohibiting the direct connection to the electrical mains, so even in areas of rural electrification, the dealer would be able to sell batteries and chargers to satisfy the need.