Rabies Vaccines for Dogs and Cats: What Every Owner Should Know (Plus Microchip Basics)

Rabies is one of the most severe and life-threatening diseases that can be transmitted from animals to humans. Once symptoms appear, the chance of survival is extremely low, which makes prevention critically important — both through vaccinating pets and through proper care when a person is bitten by, or comes into contact with, an animal that may carry the virus.

Thailand has a specific law governing rabies — the Rabies Act B.E. 2535 (1992) — which sets out pet owners' responsibilities for preventing and controlling the disease. For dog and cat owners, the key things to know are when to start vaccination, how booster shots should be scheduled, and whether, in certain areas or cases, there are additional requirements for identifying animals, such as microchipping and registration.

This article brings together information on rabies vaccines for dogs and cats, along with the basics of microchipping, to help pet owners plan proper care for their animals.

How Dangerous Is Rabies, and Why Is Vaccination Necessary?

Rabies is caused by a virus that attacks the nervous system and can be transmitted from animals to humans. The virus is present in the saliva of an infected animal, so being bitten or scratched — or having infected saliva come into contact with a wound or mucous membrane — can allow the virus to enter the body.

In the early stages, an infected animal may still appear normal, making the illness hard to detect. But once symptoms begin to show, changes in behavior are often observed — such as unusual aggression, excessive drooling, difficulty swallowing, unsteady walking, or paralysis. Once symptoms appear, the disease carries an extremely high risk of death.

For this reason, vaccinating dogs and cats against rabies on schedule is a crucial way to prevent the disease and reduce the risk to both pets and family members.

What Does Thai Law Require Regarding Rabies Vaccination?

Thai law requires owners of controlled animals to bring them in for rabies vaccination on schedule. For dogs, the first dose must be given at 2 to 4 months of age, with subsequent doses following the schedule stated on the vaccination certificate.

After vaccination, owners receive a vaccination certificate and an identification tag for the animal, confirming that it has been vaccinated.

Beyond vaccination, owners are also required to notify the authorities within 24 hours if their animal shows symptoms suspected to be rabies, or if it has been bitten by another animal suspected of carrying the disease.

If an animal has been bitten, the law requires the owner to observe it for symptoms for at least 6 months. If any signs suspected to be rabies appear, the animal must be quarantined and the authorities notified within 24 hours.

So for dog and cat owners, the most important things are to bring their pets in for vaccination on schedule, keep the vaccination certificate on hand, and follow the veterinarian's advice whenever the pet is bitten or shows unusual symptoms.

Why Do Clinics Often Recommend Microchipping at the Same Time as Vaccination?

Microchipping does not require anesthesia. A veterinarian uses a needle to implant a small capsule under the skin, usually at the base of the neck or between the shoulder blades, and the sensation is similar to a routine injection.

This is why clinics often recommend microchipping at the same visit as vaccination. Doing both together reduces the number of clinic visits needed and lessens the stress of travel for the pet. In addition, a microchip helps confirm a pet's identity, making it easier to trace the owner if the pet ever gets lost.

What Is a Microchip, and What Should Owners Know?

A microchip is a tiny electronic device about the size of a grain of rice. It contains a unique identification number for each animal — typically a 15-digit code — that functions like the animal's "ID number" and can be linked to the owner's registered information, such as name and phone number.

For an AnyVet Microchip, owners should register the chip number along with their contact information right after implantation, and always keep that information up to date — especially after changing phone numbers or address. If the microchip is not registered, or the information is outdated, it may not be possible to reach the owner if the pet ever goes missing.

How to Prepare Before Vaccination and Microchipping

Before the appointment, check that your pet is healthy — eating and passing waste normally, with no fever or unusual lethargy. If your pet seems unwell, let the veterinarian know before vaccination.

Bring your pet's vaccination booklet or previous vaccination history so the veterinarian can review it and plan the next dose appropriately.

For a standard microchip implantation that doesn't require anesthesia, there's usually no need to withhold food or water beforehand, unlike surgery. Still, it's best to check with the clinic in advance to be sure. After vaccination, it's a good idea to stay at the clinic for a short observation period, since severe allergic reactions are uncommon but still worth watching for.

Caring for Your Pet After Vaccination and Microchipping

After vaccination and microchipping, most pets can go back to their normal routine. Some may experience mild lethargy, reduced appetite, or slight, temporary swelling at the injection or implant site, which usually resolves on its own.

In the first few days, avoid strenuous activity and make sure the injection or implant site isn't pressed on or bumped. If you notice unusual symptoms — such as facial swelling, difficulty breathing, severe vomiting or diarrhea, a body-wide rash, or unusual lethargy — contact your veterinarian or bring your pet back immediately, as these may be signs of a severe allergic reaction requiring treatment.

What to Do If You Suspect Your Pet Has Been Exposed to Rabies

If a fully vaccinated pet is bitten or scratched by another animal suspected of carrying rabies, the owner should still take it to a veterinarian for assessment, even though it already has immunity — a booster shot may be recommended. The owner must also notify the livestock/animal health authorities within 24 hours as required by law, and keep the pet under close observation for at least 6 months. For a pet that has never been vaccinated and is exposed to the virus, the risk is much higher, making it even more urgent to see a veterinarian as soon as possible.

Frequently Asked Questions About Rabies Vaccines and Microchips

My dog or cat lives entirely indoors and never goes outside — does it still need a rabies vaccine?
Yes. Thai law requires every pet to receive the rabies vaccine, regardless of whether it's kept strictly indoors or allowed to roam outside. There's also always a chance of unexpected exposure — for example, another animal getting into your house or garden.

I missed my pet's annual booster shot by several months — does the whole vaccination series need to start over?
You should consult a veterinarian as soon as possible so they can assess what's needed. In general, if the delay isn't too long, the vet may simply give a booster without restarting the whole program. But if too much time has passed, they may recommend starting the initial series again to ensure adequate immunity.

My pet already has a microchip — do I still need to bring it in for annual booster shots as before?
Yes, vaccination should continue as usual. A microchip only serves to confirm a pet's identity if it becomes lost or goes missing — it has no effect on immunity or disease prevention. You still need to bring your pet in for rabies vaccinations on the schedule required by law and recommended by your veterinarian.

Summary

The rabies vaccine is a mandatory vaccine that every dog and cat owner must take seriously. The first dose should be given at around 3 to 4 months of age, followed by a booster at 1 year, and then annual boosters for life as required by law. On the same visit, owners can also consider microchipping their pet, since it requires no anesthesia and adds long-term security — especially valuable if the pet ever gets lost. Keeping up with both of these, fully and on schedule, is a simple preventive health measure that pays off for your pet and your family for years to come.

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This article is provided for general information only and cannot replace a diagnosis from a veterinarian. If your pet is showing any unusual symptoms, please consult a veterinarian at your nearest animal hospital directly.