An improved electric fence wire construction, especially for intensive grazing, is comprised of an electrically conductive wire core, sandwiched between the two halves of a single strip of thin metallic foil. The foil is folded upon itself, enveloping the wire core. The halves are bonded together by a suitable adhesive which does not inhibit flexibility of the improved wire. The foil serves to purposes, the first being to enhance visibility for the animals. Secondly, the foil offers much more electrically conductive surface area than a bare wire, so a more effective deterrent is presented to the animal. The wire can be used as a component of a permanent electrified perimeter fence, or in a temporary movable electric fence. The improved wire is especially useful in a method of intensive grazing wherein the improved wire is a component of at least two temporary fences that are moved at regular intervals. This allows high densities of animals in a small paddock area for short periods of time, thereby grazing the forageable plants to a uniform degree, and enhancing pasture management by inhibiting overgrowth of undesirable pasture plants such as weeds.