Companion Animal Microchipping and Welfare

Microchipping companion animals improves welfare outcomes by enabling lost animals to be reunited with owners and reducing shelter euthanasia rates.

Key Facts

Microchipped dogs are returned to owners at 2.5 times the rate of non-chipped dogs
Most US states and many countries now mandate microchipping for dogs
Microchips are implanted with a needle and cause brief, minimal discomfort
Outdated or incorrect registry information makes microchips ineffective — owner updates are essential
ISO standard chips (134.2 kHz) are now the global standard though older chips persist in some regions

Welfare Considerations

Microchipping represents one of the simplest and most cost-effective welfare interventions for companion animals, because reuniting lost animals with their families prevents shelter stress, potential euthanasia, and the trauma of long-term homelessness. The welfare value depends on owners keeping registry information current and veterinarians scanning all incoming strays for chips. Mandatory microchipping programs in countries including the UK and New Zealand have demonstrated measurable reductions in euthanasia of returned animals.

What You Can Do

Microchip all your companion animals if they are not already chipped
Keep microchip registry information updated when you move or change phone numbers
Scan all found animals for chips before assuming they are strays
Advocate for mandatory microchipping in jurisdictions that lack requirements
Support universal chip readers that scan multiple frequencies in shelter settings