Why Pet Microchipping Works and What Every Owner Should Know
Microchipping stands as one of the most reliable forms of permanent pet identification we have today. Unlike collars or tags that can slip off during an unexpected dash through the neighborhood or fade until they’re no longer readable, a microchip provides lifelong identification that stays with your companion and can’t be lost.
The implantation process is quick and doesn’t require anesthesia. Yet despite its straightforward nature, lingering questions about safety and registration mean countless pets remain unchipped—or carry chips that aren’t connected to current owner information. In either scenario, the chip offers no protection when it matters most.
Understanding how microchips work, what the procedure involves, and why registration represents a separate but equally important step allows you to take advantage of what is otherwise a simple yet genuinely meaningful preventive measure.
How pet microchips actually work
A microchip is a tiny, passive electronic device about the size of a grain of rice. It contains a unique identification number encoded on a miniature transponder. The chip has no battery and no moving parts. It doesn’t emit any signal on its own and can’t track your companion’s location.
When a microchip scanner passes over the implantation site, it releases a low-frequency radio wave that briefly activates the chip. The chip then transmits its unique identification number back to the scanner, which displays the number on screen. That number is then cross-referenced against a microchip registry to retrieve the owner’s contact information.
The microchip itself stores no personal details. It contains only the identification number, while the owner’s contact information remains securely held in the registration database. This is precisely why registering the microchip—and keeping contact information current—matters just as much as having the chip implanted in the first place.
What to expect during the microchipping procedure
Microchipping is a straightforward procedure performed using a needle only slightly larger than those used for routine vaccinations. The microchip arrives pre-loaded in the needle and is implanted beneath the skin, most commonly between the shoulder blades in both dogs and cats. The procedure takes just seconds and typically doesn’t require sedation or anesthesia.
Most pets handle the process remarkably well, experiencing only a brief pinch comparable to a routine injection. No sutures are needed, and the injection site rarely requires aftercare beyond a quick check to confirm proper placement.
Microchipping can be completed during any routine visit and usually doesn’t need to be scheduled as a separate appointment. At Ellis Crossing Animal Hospital in Durham, NC, we commonly implant microchips during puppy and kitten vaccine visits or at annual wellness exams if it hasn’t yet been done.
Why microchips offer more protection than collars alone
Collars and ID tags represent an important first line of identification, but they’re far from foolproof. A collar can slide off during an escape, and ID tags can become damaged or unreadable through everyday wear.
When a lost pet arrives at an animal hospital or shelter without visible identification, locating and contacting the owner becomes considerably more difficult.
A microchip addresses this vulnerability directly. Because it’s implanted beneath the skin, it can’t be removed or lost the way a collar or ID tag can.
Animal hospitals, shelters, and numerous animal control agencies routinely scan found pets for microchips, creating a reliable pathway to connect lost animals with their families. A chipped pet therefore has a clear route home even when all external identification has disappeared.
The benefits of microchipping become most evident when a pet goes missing. A found pet with a readable microchip and current registration details can often be reunited with its owner within hours.
Without a microchip—or with outdated registration information—the reunion process can stretch much longer or may not happen at all.
Registration: the essential step many owners forget
Implanting a microchip without completing registration provides limited protection. The microchip number only proves useful when it can be connected to current owner contact details held in a searchable registry.
Registration is completed by submitting the microchip number along with current owner contact information to a microchip database. Some registries charge a one-time fee, while others are free. Your care team can advise on which registries are most widely accessed in your area, as scanner compatibility and database coverage vary by region.
One of the most common reasons lost pets aren’t reunited with their families—even when they have a microchip—is because the microchip was never registered or the owner’s contact information has become outdated. The microchip number may be retrieved successfully at the shelter or hospital, but the database search returns no matching contact details.
That’s why registering your pet’s microchip promptly and updating your information whenever your address, phone number, or email changes is so important.
Keeping your registration information up to date
Registering your pet’s microchip isn’t a one-time task completed at implantation. Owner contact details must be updated whenever information changes. When your contact information updates or ownership transfers, updating the microchip registration should receive the same priority as updating any other essential contact record.
A microchip registered to a previous address or disconnected phone number can’t facilitate reunification, regardless of how quickly the chip number is retrieved. A microchip is only as effective as the contact information linked to it.
We recommend verifying that your registration details are current at every annual visit. If you’re unsure which registry your pet is registered with, the team at Ellis Crossing Animal Hospital can help locate that information using the microchip number.
Common microchipping concerns addressed
Although microchipping is a routine procedure, many pet owners still have questions about how it works and whether it’s safe. Below are some of the most common misconceptions and what the evidence actually shows.
Microchips track my pet’s location
A microchip is a passive device that doesn’t transmit any signal on its own. It can’t track a pet’s location at any time. It stores only a unique identification number, which is readable only when a scanner is directly applied. Location tracking requires a GPS device, which is an entirely separate technology with different components and operating requirements.
The procedure causes pain
A microchip is implanted with a needle only slightly larger than a standard vaccination needle. The procedure takes a few seconds and typically doesn’t require anesthesia. Most pets tolerate the process very well, experiencing only a brief pinch comparable to a routine injection. There’s no recovery period and no restriction on activity afterward.
Microchips cause cancer
This concern originated from early animal studies, but current evidence doesn’t support a clinically relevant association between microchipping and tumor development in cats or dogs. Medical professionals and regulatory organizations continue to consider microchipping safe for routine use. If you have specific concerns about your pet’s individual health history, these are best discussed with your care team prior to the procedure.
One microchip is enough and requires no follow-up
The microchip itself requires no maintenance and doesn’t expire after implantation. What requires ongoing attention is the registration information. A microchip with outdated contact details can’t serve its purpose. If your phone number, address, email, or ownership information changes, you’ll need to update your registration.
Using microchips alongside other identification methods
Microchips and external identification methods work best together rather than as replacements for one another. A collar with a current ID tag allows someone who finds your pet to contact you immediately, without any specialist equipment. A microchip provides a permanent backup that remains in place if external identification has been lost.
The most effective approach to pet identification uses both. A visible tag supports rapid reunification in everyday situations. A microchip provides a reliable secondary layer of identification when the collar is absent.
Some pet owners also choose to use GPS tracking collars, which allow them to monitor their pet’s location in real time. These devices require regular charging and an active cellular subscription. While GPS trackers can be a valuable addition, they don’t replace microchipping. Unlike a GPS device, a microchip functions without power or signal and requires no ongoing maintenance beyond keeping registration details current.
What to do if your microchipped pet goes missing
If your microchipped pet goes missing, contact your microchip registry promptly to confirm that your contact details are current and to report your pet as missing if that functionality is available through your registry. Notify local animal hospitals, animal control agencies, and animal shelters directly and provide the microchip number so that if a matching lost pet is brought in, it can be scanned for that specific number.
If you’ve found an animal and can’t locate an owner, bring the animal to an animal hospital or shelter to be scanned. Once a microchip number is identified, the appropriate registry can be contacted to help locate and contact the registered owner. This process is one we carry out as a matter of routine at Ellis Crossing Animal Hospital in Durham, NC, and we’re always willing to scan a found animal whether or not the pet is a patient of our practice.
A simple step with lasting impact
Microchipping is one of the most cost-effective preventive measures available to pet owners. The procedure is quick and the microchip is permanent. When paired with current registration, protection is substantially greater than any form of pet identification that can be lost or removed.
The most common reason microchipping fails to reunite pets with their families is the lack of microchip registration, or outdated information. Ensuring the microchip is registered and that details remain current is where the real protective value lies.
If you’re in Durham, NC, our team at Ellis Crossing Animal Hospital can microchip your pet at a routine visit, confirm whether an existing chip is readable and correctly registered, and help you verify or update your contact details on the relevant registry.
Frequently asked questions
FAQ 1: Does microchipping hurt my pet?
The microchip is implanted using a needle slightly larger than a standard vaccination needle. The procedure takes only a few seconds and doesn’t commonly require sedation or anesthesia. Most pets tolerate it well, and the experience is broadly comparable to a routine injection. There’s no recovery period and no activity restriction required afterward. If you have concerns about how your individual pet may respond, particularly if they’re anxious during medical procedures, discuss this with your care team before the appointment.
FAQ 2: Do I need to do anything after my pet is microchipped?
Yes. Once the microchip is implanted, registration must be completed separately by submitting the microchip number and your contact details to a microchip database. Without this step, the chip number can’t be connected to an owner if the animal is found. You should also ensure your information is updated whenever your contact details change. We recommend reviewing this at each annual visit as a routine part of preventive care.
FAQ 3: Is my pet’s microchip compatible with all scanners?
Most animal hospitals, animal control agencies, and animal shelters use universal or forward-reading scanners that can detect the vast majority of pet microchips. However, scanner compatibility isn’t guaranteed across all devices, and some older chips or regional variations may not be detected by every scanner type. If you’re traveling internationally with your pet, check the microchip frequency requirements of your destination country, as some regions have specific standards that must be met for entry. Your care team can advise on whether your pet’s microchip meets the requirements for your intended travel.