Attaching a tag to your dog's collar is a good idea for several reasons:

• The main reason to attach a tag to your dog's collar is to provide immediate identification in case they get lost. The tag should at least include a phone number where their humans can be reached. This allows anyone who finds the dog to contact you quickly.
• In many areas, it is mandatory for dogs to have identification on them when they are outside the home. Attaching a tag to the dog's collar ensures that you comply with local regulations regarding pet ownership and animal control.

If you want even more peace of mind, we recommend buying an Apple AirTag and attaching it to your dog's collar or harness via the AirTag case.