I have heard of some sort of chip that gets implanted under the skin, I noticed a sign on the local vet's office that said tracking chips installed here. I guess it is GPS involved.
Not yet, we can only hope. Those are for the little fluffy pets so when they get lost in the city and the neighbor takes the dog to the vet they can scan it for the chip and see who the owner is. No tracking capabilities. We have the technology but no one has tried to make it affordable and for dog hunters.
Doubt any of those hands will be taking the dogs to the vet to get them checked for a chip...