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Invisible Fence Inc. (commonly referred to as Invisible Fence Brand) is a company that designs radio pet fences for cats and dogs. Manufactured and distributed by Radio System Corporation, the company sells wireless and fenceless systems that were first introduced in 1973. [ 1 ]
Other pet fences are wireless. Rather than using an underground wire, they emit a radio signal from a central unit, and activate when the pet travels beyond a certain radius from the unit. In another type, the collar uses GPS signals to determine proximity to a predetermined "virtual fence", without the need for any physical installation at all.
A "stun–lethal" fence may also consist of two fences; one set of wires forming a conventional pulsed DC non-lethal fence, the second set (interleaved with the first) forming a 6.6 kV AC lethal fence, energized when the DC fence detects an intruder. Alternatively it may consist of a single, AC or pulsed DC fence capable of running in "safe ...
These collars utilize sounds and vibrations, and static rather than shock, to keep dogs within predetermined boundaries via GPS wireless fences. [66] Halo Collar, which was designed in part by Cesar Millan , [ 67 ] [ 68 ] [ 69 ] is an example of this technology.
The Drs. Foster & Smith line of products, launched in 1993, includes products ranging from company-formulated brands of cat and dog food to medications and pet furniture. A series of mergers in the early 2000s added aquarium, bird, ferret , and other specialty products to the company's catalogs.
A pet door or pet flap (also referred to in more specific terms, such as cat flap, cat door, kitty door, dog flap, dog door, or doggy/doggie door) is a small opening to allow pets to enter and exit a building on their own without needing a human to open the door. Originally simple holes, the modern form is a hinged and often spring-loaded panel ...
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