About Microchips
Unlike ID tags, microchips are permanent yet even they are not foolproof. Sometimes they migrate from the spot where usually implanted and are missed. Occasionally at a busy shelter, the scanning protocol may be overlooked. Also, there are multiple microchip registries and that leads to confusion Another drawback is that pet parents forget to update their contact information with the registry and then it is no longer possible to trace them easily. Also some people do not know about microchips and if they rescue a stray they may not know to have it scanned by a vet or a shelter which is usually a courtesy service, that is - no charge.
Many companies now offer microchips for pets. They are not terribly expensive. Often humane societies offer low-cost microchipping, so ask your local humane society or consult your vet. Remember, having some form of ID for your pet, especially a microchip, will greatly increase its chances of recovery.