Companion Animal Microchipping and Identification

Microchipping companion animals is now mandatory for dogs in the UK and increasingly recommended for cats, significantly improving welfare outcomes for lost animals and supporting responsible ownership.

Key Facts

Dog microchipping became mandatory in England, Wales, and Scotland in April 2016
Compulsory cat microchipping became law in England from June 2024
Microchipping a dog has been shown to increase the chance of owner reunion by 2.4 times
Unchipped stray animals are more likely to be euthanised rather than reunited with owners
Microchip databases require up-to-date registration to be effective

Welfare Considerations

Microchipping directly improves welfare by enabling lost animals to be reunited with their owners rather than spending extended periods in rescue shelters or being euthanised. The welfare cost of the procedure itself is minimal - equivalent to a vaccination injection - while the welfare benefit over a lifetime is significant. The system depends on accurate database registration, and many microchipped animals cannot be traced because owners have not updated contact details following moves or changes of telephone number. Regular database checks should be incorporated into annual health maintenance.

What You Can Do

Ensure all dogs and cats are microchipped and that database details are kept current
Microchip other companion animals voluntarily even where not legally required
Check your microchip registration after any change of address or phone number
Support extension of mandatory microchipping to other species
Scan any stray animal you find to check for an existing microchip