Microchips have been particularly useful in the return of lost pets.

They can also assist where the ownership of an animal is in dispute.

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Microchipping is becoming increasingly standard at shelters: many require all outplaced animals to receive a microchip, and provide the service as part of the adoption package.

Animal control officers are trained and equipped to scan animals.

The scanner presents an inductive field that excites the coil and charges the capacitor, which in turn energizes and powers the IC.

The IC then transmits the data via the coil to the scanner.

Horses are microchipped on the left side of the neck, half the distance between the poll and withers, and approximately one inch below the midline of the mane, into the nuchal ligament.

Birds' microchips are injected into their breast muscles.

Some countries, such as Japan, require ISO-compliant microchips on dogs and cats being brought into the country, or for the person bringing the pet into the country to also bring a microchip reader that can read the non-ISO-compliant microchip.

A National Animal Identification and Tracing scheme in New Zealand is currently being developed for tracking livestock.

Microchip tagging may also be required for CITES-regulated international trade in certain rare animals; for example, Asian Arowana are so tagged, in order to ensure that only captive-bred fish are imported.