Microchipping is one of the most effective and welfare-positive interventions for companion animals, dramatically improving the chances of reunion with owners after loss or theft.
Microchipping is a low-cost, low-risk intervention with high welfare returns. Lost and stolen animals that cannot be reunited with owners enter shelter systems where they face stress, potential disease exposure, and in some cases euthanasia if not rehomed. Microchipping dramatically increases reunion rates and reduces these welfare costs. The main welfare failure in microchipping is not the technology but the implementation: chips that are implanted but not registered to current contact details provide no benefit. Owner education about keeping registration databases up to date — including address changes — is as important as the chip itself. Extending mandatory microchipping to cats, horses, and other companion species increases welfare benefits at minimal cost.