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Independent guide · Updated 2026-09-21

Identification: microchips, tags and trackers

Identification options compared for reliability, legal requirement and the practical chance of getting an animal home.

DogsCats
Pet care equipment relevant to identification: microchips, tags and trackers
Equipment safety checks for fit, fasteners, materials, cleaning and supervision
Check fit, fasteners, materials, cleaning access and supervision needs before relying on any pet product.

What to look for

Permanence
A registered microchip is the only identification that cannot fall off, and is a legal requirement in many places.
Readability
Engraved tags should carry a current phone number, not the animal's name alone.
Battery devices
GPS trackers help locate a roaming animal but fail with flat batteries or poor signal, so they supplement rather than replace a chip.

Sizing and fit

Tags and tracker housings should be light enough not to drag on the collar; cats need a quick-release collar rather than a fixed buckle.

Safety checks

  • Check collar fit with two fingers and re-check on growing animals.
  • Use breakaway collars for cats.
  • Keep tracker charging cables away from chewing pets.

Cleaning and maintenance

Update registered chip details after every move or phone change, and replace worn tags before the engraving becomes unreadable.