✔ 最佳答案
A microchip is permanent identification, not gps tracking. GPS tracking is a lot more expensive and usually is handled through the use of a tracking collar as it is WAY too large to be injected under the skin with a microchip. Unfortunately, a tracking collar can be removed easily if someone finds your dog. Most animal shelters scan for microchips, so if your dog ends up there even years later you can be contacted about it.
If you want to do GPS, I would still use a microchip as it can be used as proof of identity.
Here are tracking systems..
http://www.gundogsonline.com/dog-tracking-collar/
They start at about $1000 for the receiver and collar..