First, make sure the chip has really failed
A chip that does not beep at the first pass has not necessarily stopped working. Chips can drift from the spot between the shoulder blades where they were placed, settling lower on a shoulder, down a foreleg, or along the chest wall, and a quick sweep over the back alone will miss them. Ask the veterinary team to scan your dog slowly from head to tail and side to side, try a second scanner if the practice has one, and repeat the check on a different day if your dog was wriggling. Only treat the chip as failed after that thorough search comes up empty.
Why a working identification plan cannot rest on one chip
Even a healthy chip only helps if the person who finds your dog takes him to a vet or shelter and that site scans him. A chip carries no location signal, cannot be read by a neighbour who finds your dog in a garden, and is only as current as the registry entry behind it. That is why a failed chip matters quickly: until it is replaced, your dog has no invisible safety net if his collar comes off, and collars do slip during an escape or a scuffle.
The replacement visit, step by step
Book a specific appointment for the problem rather than adding it to a rushed routine visit. At the visit, confirm the old number from your records so the team knows exactly what they are looking for, watch the full-body scan happen, and if nothing registers, ask for a new chip to be implanted at that same appointment. Before leaving, scan the new chip once more to prove it reads, note its number yourself, and register it with your current mobile number, a second contact, and your home address. If the old chip is later found during an X-ray or a future scan, tell the registry so the records are not confused.
Check the registry details, not just the hardware
Many reunions fail not because a chip failed but because the phone number behind it belonged to a previous home. While you are sorting the replacement, log into the registry entry for any other chips in the household, confirm the details still reach you, and update them if you have moved or changed numbers. Keep a photo of the new chip number with your dog's other records so you never have to guess it during a stressful phone call with a shelter.
Add a visible backup while you wait
Between discovering the failure and completing the replacement, keep your dog on a lead in unsecured areas, check that his collar fits snugly enough not to slip over his head, and make sure a readable ID tag is attached. Do not rely on a garden gate or a usually reliable recall during that gap, because this is exactly the window when identification matters most.
When to act the same day
If your dog is already missing and you learn the chip has failed, do not wait for the replacement process. Alert local shelters and vets directly with a photo and description, because staff cannot rely on a scan to identify him, and search the area yourself rather than assuming a finder will be able to contact you through the chip.
A second, scannable route home makes the gap far less risky, and KinsLe helps there because its Verified QR ID Pet Profiles put a unique collar QR on your dog that any finder can scan to reach his profile and you.