Microchipping Your Pet: How It Works and Why It Matters for Their Safety

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By Dominion Valley Animal Hospital | July 1, 2025

Pets are family. But even the most careful pet owners know accidents can happen—a door left open, a hole in the fence, a loud noise that causes a sudden dash. In those moments, a collar tag might fall off, but a microchip won’t. Microchipping offers a simple, reliable way to help ensure a lost pet can find its way home.

What Is a Pet Microchip?

A microchip is a small, electronic chip encased in a glass cylinder about the size of a grain of rice. It is implanted just under your pet’s skin, typically between the shoulder blades. Each chip contains a unique identification number that can be read by a scanner.

The chip itself does not use GPS or track your pet’s location. Instead, it works passively, only when a veterinarian, animal shelter, or rescue center uses a microchip scanner. That scanner reads the chip’s number, which is then matched with your contact details stored in a secure pet registry.

How Microchipping Works

The process is straightforward and quick. During a routine veterinary visit, the chip is inserted using a sterile needle, similar to a vaccination. Most animals tolerate it well, and it does not require anesthesia.

Once implanted, the next step is crucial: registering the microchip with your current contact information. Without registration, the chip is just a number. Pet registries hold your name, phone number, address, and any secondary contacts you choose. Some registries also allow updates online, which is important if you move or change phone numbers.

Why Microchipping Matters for Pet Safety

1. Improves the Chances of Reuniting Lost Pets

Countless pets go missing every year, and many are never returned simply because their owners can’t be located. According to multiple studies, microchipped dogs are over twice as likely to be returned home, and microchipped cats are twenty times more likely to be reunited with their families.

Unlike collars and tags, microchips do not break or fall off. They offer a permanent form of identification that stays with your pet for life.

2. Works Across Shelters and Clinics

Most animal shelters and veterinary clinics have universal microchip scanners. When a stray or lost pet is brought in, scanning is often one of the first steps. If your pet is microchipped and the contact information is up to date, they can notify you right away.

3. Supports Legal Ownership Claims

In disputes over pet ownership or in cases of theft, a registered microchip can serve as evidence of ownership. It provides a traceable link between the pet and the person who registered the chip.

4. Enhances Emergency Preparedness

During natural disasters or emergencies, pets can easily get separated from their families. Microchipping can speed up the process of identification and reunion, even across city or state lines.

Common Questions About Microchipping

Does It Hurt?

Microchipping is comparable to a regular shot. While the needle is slightly larger than a vaccine syringe, the process is fast and doesn’t require sedation in most cases. Pets typically resume normal behavior right after the procedure.

Can the Microchip Move or Fail?

Chips are designed to stay in place, though they may shift slightly within the tissue. They are made to last the lifetime of your pet and rarely malfunction. However, scanning during regular checkups ensures it remains readable.

What If I Forget to Register or Update My Info?

An unregistered microchip won’t help locate you if your pet is lost. Fortunately, registries usually send reminders to update information annually or when veterinary appointments note changes. Keeping your details current is key.

Microchipping Complements Other Safety Measures

While microchipping is a powerful tool, it should be part of a broader approach to pet safety. ID collars and tags are still useful, especially when your pet is found by a neighbor who may not have access to a scanner. But for long-term protection, especially in chaotic or unfamiliar situations, microchips provide a reliable backup.

Microchipping your pet is a small step that offers significant peace of mind. It’s safe, affordable, and can make the difference between permanent loss and joyful reunion. If your pet isn’t microchipped yet, consider speaking to your veterinarian about getting it done during your next visit—and don’t forget to register and update your information regularly.

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