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GPS microchips do not function like a tracking device. The name implies that the chip utilizes GPS satellites. This is a misconception. There is no “GPS” microchip. This is a misleading marketing tactic to sell the product. In reality, the microchip’s main function is for identification purposes. They are small implants that can be placed under the dog’s skin through injection at a veterinarian’s office. It works with a radio frequency identification technology (RFID) that does not require a power supply or battery. The chip is programmed with the owner’s name in code form, along with the dog’s name and description. GPS microchips have been around since the early 90’s, and are currently made with bioglass materials. These implants can last up to twenty-five years. As for the health and safety issue, there is debate on the long term effects of the microchip and the possibility that it may cause cancer or tumors.
A GPS microchip collar works the same as the implant version. The chip is placed within a collar and is used for identification. The main difference is the chip itself. Since they don’t need to be injected, their construction is larger and can utilize a USB or memory card type chip. PetSafe Micro I.D. Rescue collar is a brand that uses this technology.
The downside of a “GPS” microchip collar or implant is that your pet needs to be found first before he can be identified and returned to you. Although animal shelters may have the ability to scan for implants, it is possible that the microchip can move to a location within the dog’s body where it can not be read effectively.