Pet ID tags are like drivers' licenses. They identify your dog by name, breed, owner's address and phone number. Like people, your dog should have multiple forms of identification. You may opt to have your dog micro-chipped, in which case you will be give a tag containing his microchip identification number. You can also get a basic ID tag with your dogs name and your contact information engraved. Additionally, your vet will provide a rabies vaccine tag that contains the veterinary hospital contact info.