A great reminder Doganjo
Louise G, unfortunately these thieves don't care about hacking off ears, which is why American Pitbulls were registered and tattooed on the inner thigh ( it's harder to hack off part of a hind leg without killing the dog).
Pitbulls were being stolen for fighting at the time back in the eighties (
am I really old enough to be working in those years! )
The theives would need a microchip scanner and surgical kit to remove an implanted chip which could have been injected anywhere around the dogs neck or back or even migrated somewhere else in the body. Not impossible but a lot of effort for them.