You add the second contact to the record held by the registry where your dog's chip is enrolled — not to the chip itself. That distinction runs everything that follows. A microchip stores no names, no addresses, and no phone numbers. When a shelter or clinic scans your dog, the scanner displays one thing: the chip number. Whoever holds the scanner then contacts a registry to look that number up, and the contact details attached to the number are what the registry reads back. If those details are stale or single-threaded through you alone, the chip has done its job and the system still fails.
Finding the Registry That Holds Your Record
The opening digits of the chip number act as a prefix that points toward the registry the chip was enrolled with, and your paperwork from implantation, your veterinarian's records, or a lookup using the full number will usually confirm which registry holds the live record. Go to that registry. Updating a record anywhere else changes nothing, because the finder will be directed by the prefix to the enrolling registry's database. If you discover your dog was never actually enrolled after implantation — a surprisingly common gap — enrolling properly now matters more than any second contact.
Making the Update
Most registries let you add or change contacts through an online account, and most also handle it by phone if you have the chip number and can pass their security checks. Add your second contact's full name, a mobile number, and a second number if they have one, and double-check your own listed numbers in the same visit — owners often discover their own entry still shows a landline from two homes ago. Note any confirmation the registry gives you, and ask how long the change takes to appear on the record a finder would reach.
Choosing a Contact Who Will Actually Work
The right second contact answers an unfamiliar number, lives close enough to collect your dog or authorise next steps, and knows your dog well enough to describe her and stay calm. Ask before you list them, explain what a call would mean — a shelter or clinic saying your dog has been found — and make sure they hold your veterinarian's number and know where a spare key lives. A contact who learns of their role from the emergency call itself will hesitate at exactly the moment decisiveness matters.
The Chip Number Itself Belongs in Your Records
Keep the full chip number written down somewhere you can reach without your dog present — your phone, your records folder, a card in your wallet. Owners are routinely asked for it by registries, clinics, and insurers, and reading it off the dog requires a scanner most homes do not own. Your clinic can scan and confirm the number at any routine visit, and that visit doubles as a migration check: chips occasionally shift position under the skin, and a chip that has moved is harder for a shelter's first scan to find. Confirming the number, its position, and its registry entry in one appointment closes three gaps at once.
Verifying the Change Stuck
Log back in, or ask your clinic to scan and check at the next visit, and confirm the record now shows both contacts correctly spelled with current numbers. Repeat that check whenever anyone changes a phone, and treat the record as a living document rather than a form completed once at puppyhood. For an everyday layer on top of the chip, KinsLe offers Verified QR ID Pet Profiles, placing a scannable code on the collar itself that leads a finder straight to your dog's profile without any database lookup.