There are two types of tracking devices for dogs, microchips and GPS units. Both can help you track down and locate your pet if it ever gets lost. When combined with traditional identification methods, tags and collars, GPS units or microchips significantly increase the chances of you being reunited with your dog. As with any technology, there are benefits and limitations that come with each type. If you are looking into getting a dog or already have one, you may want to consider the extra protection these devices afford.
Microchips
Microchips carry your pet's identification information inside a small glass capsule that is placed under loose skin. The implant cannot fall out or get lost and is easy to insert. The glass tube is made of soda lime glass so it wont cause irritation or infection. If your pet is lost a scanner sends out a low frequency radio wave that is picked up by a receiver in the microchip and sends your pet's identification to a readout on the scanner. The drawback is there is not yet a universal scanner available to read all kinds of microchips, so some places may not be equipped to read your pet's information.
GPS Devices
An alternate method of finding your pet is a handheld or base station GPS tracking device. The GPS is attached to your dog's collar and in the event it ever gets loose the handheld terminal will provide his location. They also provide the direction and speed your pet is traveling. These devices require batteries to operate so you must keep that in mind and know when new batteries are required. If your GPS unit does not have a handheld device or base station, then you can track your pet through your cellphone.
Other Features
Services allow you to call the provider and they will notify you of your pet's location. Some brands allow you to activate noise or lights on your dog's GPS unit to allow easy methods of locating him in rough terrain. Others allow you set up virtual fences that will set off a notification if your pet crosses the threshold.
GPS Drawbacks
GPS is not a perfect system for locating lost animals. The same problem that dog tags have can occur with a GPS unit. Because the unit is attached to the collar of your pet it can possibly get lost or torn off. Smaller dogs might be unable to wear the device if it is too big or heavy. GPS devices usually cost more than the microchip option and are limited to areas that get cellphone or Internet reception.
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