Microchipping for Lost Pet Recovery

Microchips make a big difference to the chances of a lost pet being returned to their owner, but it's important the details are kept up to date. The chip itself is a permanent implant that holds only a number. Your contact details sit on a separate database linked to that number, and that record is what a vet or warden uses to reach you when your pet is scanned. The chip can't go out of date, but the record can, any time you move or change your number.

Does a microchip make a difference?

Battersea Dogs and Cats Home, the dog and cat charity, found in their 2026 stray dog report that 84% of strays microchipped in full compliance with the law were reunited with their owner. Only 19% of strays with no chip at all made it home. When the government announced microchipping reforms in March 2024, they said microchipped dogs are more than twice as likely to be reunited with their owner.

Why a chip on its own often isn't enough

Battersea's 2026 survey of 50 local authorities, covering 460 strays collected in March 2026, found that 87% couldn't be reunited from the chip or the collar and tag alone.

The survey found three recurring problems. Some 32% of strays had never been implanted with a chip in the first place. Another 34% had a chip whose database record hadn't been updated with the current owner's details, up from 30% in 2023. And 14% had a chip that was never registered on a compliant database.

If your pet is already chipped, check the record holds your current phone number and address, and check it again every time you move or change number. In England, Wales and Scotland, every dog older than 8 weeks must be microchipped, and in Northern Ireland a dog licence requires one. In public, a dog must also wear a collar and tag with your name and address, in England, Wales and Scotland. In England, cats have to be microchipped too, from 10 June 2024; chipping cats is optional in Scotland, Wales and Northern Ireland. If your pet isn't chipped yet, you can register a microchip with Pet Database once it's in. The other ways reunions stall are covered in the page on mistakes that delay finding a lost pet.

Fewer strays are getting compliant chips

The worrying part of Battersea's surveys is the direction of travel. The share of stray dogs microchipped as the law requires, meaning a compliant chip plus a current record, peaked at 31% in 2017. It then fell to 26% in 2021, 19% in 2023 and 13% in 2026.

That 13% is the lowest since the survey began, and lower even than the 16% recorded before microchipping became compulsory. In plain terms, fewer than one in seven stray dogs now carries a chip that works as intended.

What about cats?

Cats Protection, the cat welfare charity, found in their 2025 report that 74% of cats are microchipped, slightly down on the year before, and say progress has stalled. Compulsory cat microchipping applies in England only.

Councils have no responsibility for stray cats. Only three councils issued any enforcement notices to cat owners in 2025. That makes it even more important to keep your record current.

A chip only works with a current record

A chip whose record points to a disconnected phone or a previous owner leaves a vet with no one to call. The chip only reaches you when the record attached to it is in your name and holds current details.

No published figure links microchips to the recovery of stolen pets. Microchipping won't prevent theft, but it greatly increases the chance of being reunited if your pet is found. If your pet is stolen, ask your database to mark them as stolen and give them the crime reference number, so a later scan raises the alarm. The steps that reduce the risk of theft in the first place are in the guide to preventing dog theft.

If your pet's chip isn't on a database yet, Pet Database can add your details to it. If a record exists already, check it still shows contact details a stranger could reach you on.