It's a dog owner's nightmare, really. Their dog gets loose, gets stolen, wanders. It happened just last week, with the dog my coworker found. Apparently she was a very very old dog, and had been through medical treatments lately. So, not mistreated. Just old and ill and with doggie dementia, and wandered off as her family cleaned the cellar of a Sunday. They were very grateful and happy to have her back, though I don't know what her real name is; I don't think the vet told my coworker when she called.
It's one reason I have all the tags I do on Elka's collar, on two separate rings. If one dangling rings gets lost, maybe the other will still be there. Plus her microchip. Some breeders tattoo their dogs (under anesthesia, I believe), inside the ear, or inside the inner thigh. That's a visible identifier that cannot be lost. It's why, on our car trip, Elka was on a harness attached to her leash, and with the dogIDs collar on separately, with its name plate.
