Table of contents
Key Takeaways
- Microchipping is recommended for all pets, including indoor-only animals. Escapes happen in unexpected moments, and a microchip is the most reliable way to ensure a lost pet can be identified and returned.
- The procedure is quick, minimally invasive, and requires no anesthesia. A chip about the size of a grain of rice is injected under the skin between the shoulder blades.
- A microchip only works if the registration information is current. Keeping your contact details up to date in the microchip registry is just as important as getting the chip itself.
What is a pet microchip and how does it work?
A microchip is a small electronic device, roughly the size of a grain of rice, that is injected under the skin between a pet's shoulder blades. It contains a unique identification number that can be read by a handheld scanner. When a lost pet is brought to a veterinary clinic, shelter, or animal control facility, staff can scan the animal and retrieve that number. The number is then looked up in a microchip registry, which connects it to the owner's contact information.
The chip itself is passive, meaning it has no battery and emits no signal on its own. It only activates when a scanner passes directly over it, which is what makes it safe for permanent implantation. There are no ongoing power requirements, no maintenance, and nothing that wears out over time. Once placed, a microchip typically stays functional for the life of the animal.
The injector used to place a microchip looks similar to a standard syringe with a slightly larger needle. The cap is removed, the needle is positioned at the scruff of the neck between the shoulder blades, and the chip is deposited under the skin in a matter of seconds. Most pets tolerate the procedure well with no more reaction than a standard vaccine injection. No anesthesia is required, and there is no recovery period. Your pet can go about their normal day immediately after.
The chip is encased in a biocompatible glass material that integrates with the surrounding tissue over time, keeping it in place. At routine wellness visits, your vet will typically scan the chip to confirm it's still readable and note its location in the record.
Why microchipping is worth it for every pet
Escapes happen when you least expect them
The most common objection our vets hear is some version of "my pet never goes outside" or "my dog is always supervised." These things may be entirely true under normal circumstances. The problem is that the circumstances that lead to a pet going missing are rarely normal.
A door left open by a houseguest. A contractor propping a gate while working in the yard. A child who doesn't realize the cat slips out when the front door opens. A moving day with doors constantly coming and going. These are the moments that account for the vast majority of lost pet situations, and they share a common feature: nobody saw it coming, and nobody was prepared for it.
The same applies to outdoor pets. A dog that slips a leash during a walk. A cat that gets spooked by a neighborhood dog and runs further than usual. A pet that finds a gap in a fence they've never attempted before. In all of these situations, a microchip is the difference between a lost pet that can be identified and one that can't.
Holidays and fireworks are particularly high-risk periods
If there is one time of year when microchipping matters most, it's around the Fourth of July. Veterinary clinics and animal shelters consistently report their highest volumes of lost pets in the days surrounding Independence Day, and the reason is straightforward: fireworks are genuinely terrifying for many animals.
A pet that is normally calm and predictable can become panicked by the sustained sound of fireworks and act in ways that are completely out of character. Bolting through an open door, jumping a fence they've never attempted, squeezing through a gap that seemed impossibly small. Fear overrides normal behavior in ways that can surprise even the most attentive owners.
The same dynamic applies to other loud events, severe thunderstorms, construction noise, and any situation that triggers an acute fear response in an otherwise settled animal. Even the most carefully managed pet can find a way out when they're frightened enough. A microchip doesn't prevent the escape, but it dramatically increases the odds of a reunion when one happens.
Collars and tags can be lost
ID tags on a collar are a valuable first line of identification, and our vets recommend them alongside microchipping rather than instead of it. But collars can slip off, break, or be removed. Tags can become illegible over time as the engraving wears. A collar that fits perfectly today may be too loose after a dog loses weight or too tight as a puppy grows. A microchip is permanent in a way that external identification simply isn't. It can't fall off, fade, or be separated from the animal under any circumstances.
For cats especially, collar safety introduces another variable worth considering. Breakaway collars, which are the recommended style for cats to prevent strangulation, are specifically designed to release under pressure. This means they can come off during normal outdoor activity, a climb through a tight space, or a brief struggle with another animal. A cat that loses its collar has no external identification at all without a microchip. For indoor cats that are never supposed to be outside, this scenario, a frightened cat with no collar and no chip, is one of the most challenging lost pet situations a family can face.
How microchipping differs from GPS tracking
This is a question our vets get regularly, and it's worth clearing up. Standard pet microchips and GPS tracking devices are completely different technologies that serve different purposes.
A microchip is a passive identification device. It has no battery, emits no signal, and cannot track your pet's location. It can only be detected when a scanner is held directly over it. Its value is in permanent, reliable identification once a lost pet has been found and brought to a facility with a scanner.
GPS tracking devices for pets do exist, typically in the form of collar attachments or tags. These devices use cellular or Bluetooth technology to transmit your pet's real-time location to an app on your phone. They can be useful tools for monitoring a pet's whereabouts, particularly for dogs that roam or outdoor cats. However, they require a charged battery, a cellular connection, and an active subscription in most cases. They can fall off with the collar, run out of power, or lose signal.
The two technologies complement each other rather than competing. A GPS tracker helps you locate a lost pet in real time. A microchip ensures that if the pet is found by someone else and brought to a clinic or shelter, they can be identified and returned to you. For maximum protection, both are worth having.
What happens when a lost pet is scanned
When someone finds a lost pet and brings it to a veterinary clinic, shelter, or animal control facility anywhere in the United States, one of the first things staff will do is scan the animal for a microchip. Handheld scanners are standard equipment at virtually every facility that handles lost animals, and the scan takes only seconds.
If a chip is detected, the scanner displays the unique identification number associated with that chip. Staff then look up that number in one or more microchip registries to find the owner's contact information. Universal scanners used by most facilities are capable of reading chips from different manufacturers, so the brand of chip is generally not a barrier to identification.
If the registration is current and complete, the owner receives a phone call and the reunion process begins. The system works remarkably well when it's set up correctly. When it fails, it's almost always because the contact information in the registry is outdated, incomplete, or was never entered in the first place.
Keeping your microchip registration current is non-negotiable
This is the single most overlooked aspect of microchipping, and it's just as important as the procedure itself. A microchip with no registration, or with outdated contact information, cannot reunite you with your pet. The chip is only as useful as the contact information attached to it.
When your pet is microchipped, you will receive information about how to register the chip in a national database. Complete this registration promptly if it isn't handled directly by the clinic at the time of implantation. Some practices register the chip on your behalf as part of the procedure. Others provide you with the chip number and registration instructions to complete yourself. Confirm which approach your clinic uses so nothing falls through the cracks.
Whenever your contact information changes, update your microchip registration. This is easy to forget during a move, after a phone number change, or following an email address update, but it's one of the most important things you can do to make sure the system works when you actually need it. A microchip registered to an old phone number is functionally useless in a lost pet situation.
If you're not sure whether your pet's chip is registered or what registry it's enrolled in, your vet can look up the chip number at your next visit and help you confirm the registration status. Keeping your pet's microchip number noted in the Modern Animal app alongside their other health records means you always have that information accessible, including in situations where you might need it quickly and unexpectedly.
What to expect from the microchipping procedure
If you're bringing your pet in to be microchipped for the first time, here's what the experience looks like from start to finish.
The appointment itself is brief. Microchipping is often done at the same time as a wellness exam or vaccination visit, so it doesn't require a separate trip in most cases. If your pet is scheduled for a spay, neuter, or another procedure that requires anesthesia, microchipping can be done at the same time while they're already under, which is a convenient option for pets that are particularly sensitive to handling or needle sticks.
The injection takes only seconds. The needle is positioned between the shoulder blades, the chip is deposited, and the injector is withdrawn. Your vet will then scan the chip immediately to confirm it's readable and properly placed. Most pets react minimally, similar to a standard vaccine. Some don't react at all.
There is no wound to care for afterward, no activity restriction, and no recovery period. Your pet can eat, drink, play, and go about their normal routine immediately. The area between the shoulder blades may be slightly tender for a few hours, but this resolves quickly in the vast majority of cases.
After the procedure, your vet will provide you with the chip's unique identification number. Write this down, photograph it, or enter it directly into the Modern Animal app so it's part of your pet's permanent record. Use it to confirm or complete your registry enrollment before you leave the clinic, or within the day if you need to do it online at home.
For a full breakdown of service and test pricing at Modern Animal, visit modernanimal.com/pricing. Everything is listed transparently so you know what to expect before you come in.
Microchipping is one of the simplest, most permanent things you can do to protect your pet. The procedure takes seconds, the chip lasts a lifetime, and the peace of mind it provides is real. If your pet isn't microchipped yet, your next wellness visit is the perfect opportunity. And if they are chipped, take a moment today to confirm that your registration information is current. It's a small step that could make all the difference in the world if you ever need it.
If you have questions about microchipping or want to schedule an appointment, reach out through the Modern Animal app or book a visit at a clinic near you.
Frequently Asked Questions
Most pets tolerate microchipping very well. The injection feels similar to a standard vaccine, and the reaction from most animals is minimal. Some pets don't react at all. The procedure takes only a few seconds, requires no anesthesia or sedation, and has no recovery period. There is no wound care required afterward, and your pet can resume normal activity immediately.
Yes. Indoor-only pets escape more often than owners anticipate, typically through open doors, windows, or gaps created during moments of distraction or unusual household activity. Fireworks, storms, and other fear-inducing situations can trigger escape behavior in even the calmest animals. A microchip is the most reliable permanent form of identification available and is recommended for all pets regardless of lifestyle.
Your vet can scan your pet at any visit to check for a chip. If you know your pet has been chipped but aren't sure of the number or which registry it's enrolled in, your vet can look up the chip number and help you confirm the registration status. It's worth doing this if you've adopted a pet whose history you're unsure of, or if there's any question about whether the contact information on file is still current.
Update your registration as soon as possible. A microchip with outdated contact information cannot facilitate a reunion. Most microchip registries allow you to update your information online in just a few minutes. If you're not sure which registry your pet's chip is enrolled in, your vet can help you identify it. Making contact information updates a habit any time your phone number, address, or email changes is one of the most impactful things you can do to make sure the microchip system works when you need it.
No. Standard pet microchips are passive devices with no GPS capability and no battery. They do not emit a signal and cannot track a pet's location in real time. They can only be detected when a scanner is passed directly over the chip at close range. GPS tracking devices for pets exist as separate collar-attached products and serve a different purpose. A microchip provides permanent identification. A GPS tracker provides real-time location data. Both can be valuable, but they are entirely separate technologies.
A properly implanted microchip is designed to last the lifetime of the animal. There is no battery to replace and no component that degrades over time under normal circumstances. The biocompatible casing integrates with surrounding tissue and keeps the chip in place. Your vet will scan the chip at routine wellness visits to confirm it remains readable, which is a good ongoing check that everything is functioning as expected.