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  2. Cattle grid - Wikipedia

    en.wikipedia.org/wiki/Cattle_grid

    Electric cattle grids use electricity to deter animals from crossing the fence line. There are different designs. One uses high-tensile wire run across the roadway, about 3 to 4 inches (8 to 10 cm) off the ground, attached to a power source on one side. [17] The primary advantage is cost and ease of installation. [18]

  3. Agricultural fencing - Wikipedia

    en.wikipedia.org/wiki/Agricultural_fencing

    Vinyl-coated wire fence is usually based on high-tensile wire with a vinyl coating. Some forms are non-electric, others embed layers of graphite to carry a current from the wire to the outside of the coated product so that it can be electrified. It can be of any color, with white particularly common in the United States so that the fencing is ...

  4. Electric fence - Wikipedia

    en.wikipedia.org/wiki/Electric_fence

    An electric fence is a barrier that ... of the electric fence for livestock control was developed ... virtual fence" without a physical installation.

  5. Nofence - Wikipedia

    en.wikipedia.org/wiki/Nofence

    Nofence is a Norwegian company that makes GPS collars for farm animals (cattle, sheep, and goats) that discourage them from crossing virtual fences. [1] [2] Oscar Hovde Berntsen has been working on the idea of virtual fencing, as an alternative to fixed electric fencing, since the 1990s. [3] Nofence was incorporated in 2011. [3]

  6. Fence - Wikipedia

    en.wikipedia.org/wiki/Fence

    Stockade fence, a solid fence composed of contiguous or very closely spaced round or half-round posts, or stakes, typically pointed at the top. A scaled down version of a palisade wall made of logs, most commonly used for privacy. Wattle fencing, of split branches woven between stakes. Wire fences Smooth wire fence; Barbed wire fence; Electric ...

  7. Pet fence - Wikipedia

    en.wikipedia.org/wiki/Pet_fence

    A pet fence or radio fence, is an electronic system designed to keep a pet or other domestic animal within a set of predefined boundaries without the use of a physical barrier. A mild electric shock is delivered by an electronic collar if its warning sound is ignored. The system was first invented and patented by Richard Peck in 1973. [1]