A micro-chip is a tiny electronic device about the size and shape of a grain of rice. It is implanted beneath a pet’s skin between the shoulder blades and stays there for the pet’s entire life. The procedure is as easy and as painless as a vaccination. Each micro-chip has a unique number. This number along with the pet’s and owner’s information are added to a national pet registry. Most veterinarians and animal shelters have electronic scanners for detecting and reading these implanted micro-chips. If a lost pet is found and the micro-chip is scanned, the registry is called and the owner is notified.