PetHub has a very cool approach to smart ID tags with their Link ScruffTag Collar. Each collar comes with a unique web address and QR code that can be scanned with any smart phone. The way it works is simple! Someone finds your pet. First, they try the phone number and if you’re not answering, they can scan the collar with their phone or type in the web address listed on the tag. What shows up are any details you’ve chosen to enter about your pet, including other emergency contacts (spouse, neighbor, friend, vet, pet sitter, doggie daycare, etc.), important medications, dietary needs, and anything else you think someone rescuing your pet know. You can update your pet’s info on (for free!) as often as needed to ensure your pet’s records are current.