What Is a Pet Microchip?
A pet microchip is a passive Radio Frequency Identification (RFID) device, roughly the size of a grain of rice (approximately 12mm x 2mm). Once implanted under a cat's skin, it can be read by a scanner to retrieve a unique identification number. The chip contains no battery and only transmits a signal when activated by a scanner's electromagnetic field, so it lasts a lifetime without replacement.
According to the World Small Animal Veterinary Association (WSAVA) Microchip Guidelines, microchip implantation is currently the most reliable method of permanent pet identification. Unlike collar tags, a microchip cannot fall off or be removed, significantly improving the chances of reuniting lost pets with their owners.
Legal Requirements in Taiwan
Under Taiwan's Animal Protection Act and its related enforcement rules:
- Mandatory registration: Pet owners are required to register their dogs and cats. Under Article 19 of the Animal Protection Act, owners must have a microchip implanted and register with the local municipal or county government authority.
- Spay/neuter or declaration: Owners must have their pets spayed or neutered, or file a declaration with the relevant authority explaining their breeding management plan; failure to comply may result in fines.
- Change of registration: Owners must update the registration when— the pet is transferred to another owner, the owner's information changes (such as moving or changing phone number), or the pet dies or goes missing.
- Penalties: Failure to register as required, after being advised but refusing to comply, may result in a fine of NT$3,000 to NT$15,000.
Note: Regulations may be updated at any time. Pet owners are advised to confirm the latest requirements with their local animal protection office.
Microchip Implantation Process
Implantation Method
Microchip implantation is a quick and simple procedure, similar to a standard subcutaneous injection:
- Preparation: The veterinarian will first scan the cat to confirm no existing microchip is present. According to the WSAVA Microchip Guidelines, pre-implantation scanning is a critical step to avoid duplicate implantation.
- Implantation site: The standard location is subcutaneously between the shoulder blades at the back of the neck. WSAVA recommends this standard site to ensure consistent scanning worldwide.
- Procedure: A specialized implantation needle is used to inject the chip into the subcutaneous tissue. The entire process typically takes just a few seconds, with a pain level comparable to a standard injection. Most cats can undergo the procedure without anesthesia or sedation.
- Verification scan: Immediately after implantation, a scan is performed to confirm the chip is functioning properly and the number is correct.
Ideal Timing for Implantation
- Generally recommended for kittens 8 weeks of age or older
- Many owners choose to implant at the time of spay/neuter surgery, as the cat is already under anesthesia
- Cats of any age can be microchipped
Post-Implantation Care
- The implantation site may have slight swelling or discomfort, which typically resolves within 1–2 days
- In rare cases, the chip may migrate slightly from the implantation site. According to WSAVA, this does not affect chip function as long as the scanner can still read it
- It is recommended to have the veterinarian scan and verify the chip's location and function during annual checkups
Registration Process
Initial Registration
- Completed at the veterinary clinic: Most animal hospitals can assist with pet registration immediately after chip implantation, entering the owner's and cat's information into the national pet registration system.
- Required information:
- Owner's identification document
- Cat's microchip number
- Cat's basic information (breed, coat color, sex, spay/neuter status, etc.)
- Owner's contact information (address, phone number, email)
- Fees: Microchip implantation and pet registration fees vary slightly between veterinary clinics. Typically, chip implantation costs approximately NT$300–600, and the registration fee is approximately NT$300 (spayed/neutered) or NT$1,000 (not spayed/neutered). Please confirm actual fees with the clinic.
Updating Information
When any of the owner's contact information changes, it is essential to update the registration immediately— this is the key to making the microchip system effective. Common scenarios requiring updates include:
- Moving (address change)
- Changing phone number
- Transferring the cat to another owner (change of ownership)
- Cat's death (cancellation of registration)
- Cat going missing (filing a lost pet report)
Information can be updated through local animal protection offices, veterinary clinics, or the online pet registration management system.
Chip Specifications and International Standards
According to the WSAVA Microchip Guidelines, pet microchips worldwide currently use two main frequency specifications:
| Specification | Frequency | Region of Use |
|---|---|---|
| ISO 11784/11785 | 134.2 kHz | International standard, used in Taiwan, EU, Australia, Japan, and most countries |
| AVID Encrypted | 125 kHz | Still used in some areas of the United States |
Taiwan uses the ISO 11784/11785 international standard, which is the globally recommended standard by WSAVA. Cats with an ISO standard chip can be read by scanners in most countries, making international travel more convenient.
International Travel and Microchips
If you plan to travel abroad with your cat, microchip implantation is a mandatory prerequisite:
European Union Requirements
- All entering pets must have an ISO 11784/11785 standard microchip implanted
- Rabies vaccination must be administered after chip implantation to be considered valid
- A veterinarian-issued health certificate and vaccination records are required
Common Requirements by Country
- Japan: Requires an ISO standard chip, rabies antibody titer test, and a 180-day waiting period
- United States: Requires proof of rabies vaccination; some states have additional regulations
- Australia: Strict quarantine requirements and lengthy preparation; a microchip is a basic requirement
Important reminder: Entry requirements change frequently by country. It is recommended to start preparations at least 6 months before departure and to confirm the latest requirements with the destination country's relevant authorities. Taiwan pet owners can consult the Bureau of Animal and Plant Health Inspection and Quarantine (BAPHIQ) under the Ministry of Agriculture for export quarantine procedures.
Lost Cats and the Role of Microchips
The most important function of a microchip is providing identification when a cat goes missing, helping owners and pets reunite. Here is how the process works:
- A lost cat is found by a member of the public or arrives at a shelter
- A veterinary clinic or shelter scans the chip to read the identification number
- The owner's contact information is looked up through the national pet registration system
- The owner is notified to come and retrieve their cat
According to a study published in the Journal of the American Veterinary Medical Association(Lord et al., 2009), the return-to-owner rate for microchipped lost cats was significantly higher than for those without chips. The study found that only about 1.8% of lost cats without microchips were returned to their owners, while the return rate for microchipped cats increased to approximately 38.5%. The study also found that the most common reason microchipped cats were not returned was that the owner's registration information had not been updated.
Frequently Asked Questions
Can microchips cause cancer?
According to WSAVA's position statement, reported cases of microchip-related tumors are extremely rare. Among the tens of millions of microchipped animals worldwide, the incidence of related tumors is very low. WSAVA considers that the benefits of microchipping far outweigh the extremely low risk.
Can the microchip migrate?
A microchip may migrate slightly from its original implantation site, but this usually does not affect its function. Modern chips have biocompatible coatings that help anchor the chip in the tissue after implantation. Regular scanning to verify placement is good practice.
Does a microchip have GPS tracking capability?
No. Pet microchips are passive RFID devices that do not have GPS positioning capability and cannot track a cat's location in real time. A microchip can only provide an identification number when scanned at close range with a dedicated reader. If real-time location tracking is needed, a separate GPS tracking collar or similar device is required.
Can a cat have two microchips implanted?
According to WSAVA guidelines, duplicate implantation should be avoided whenever possible. This is why a pre-implantation scan is required. If a cat already has an old chip that cannot be read, the veterinarian will assess whether a new chip needs to be implanted.
Owner's Checklist
- ☑ Confirm your cat has been microchipped and registered
- ☑ Confirm that the registration details (phone number, address) are up to date
- ☑ Have the vet scan and verify the chip during annual health checkups
- ☑ Update registration information immediately after moving or changing your phone number
- ☑ If you have international travel plans, confirm the chip specification meets the destination country's requirements
- ☑ Even with a microchip, it is still recommended to use a collar with an ID tag bearing the owner's phone number as a backup
References
- Taiwan Animal Protection Act. Laws & Regulations Database of the Republic of China.
https://law.moj.gov.tw/LawClass/LawAll.aspx?pcode=M0060027 - WSAVA Microchip Committee. "WSAVA Microchip Guidelines." World Small Animal Veterinary Association.
- Lord, L. K., Ingwersen, W., Gray, J. L., & Wintz, D. J. (2009). "Characterization of animals with microchips entering animal shelters."Journal of the American Veterinary Medical Association, 235(2), 160–167.
- ISO 11784:1996 / ISO 11785:1996. "Radio frequency identification of animals — Code structure / Technical concept." International Organization for Standardization.
- Bureau of Animal and Plant Health Inspection and Quarantine (BAPHIQ), Ministry of Agriculture, Taiwan. Import/export quarantine information for dogs and cats.
https://www.aphia.gov.tw