What is a Microchip and why is it necessary?

A microchip is a subcutaneous full duplex electronic radio transponder (What a mouthful!). Modern microchips are about the size of a grain of rice and are implanted beneath the animal’s skin between the shoulders. No personal information is stored on the microchip, only the unique identification number.
If your beloved companion gets lost a microchip scanner is used to read the animal’s microchip number, which is usually a 15-digit unique identification number. However, some older cats and dogs microchip identification number may contain letters as well as numbers.

An implanted microchip does not cause any ongoing pain or discomfort to your cat or dog and does not require a battery or any maintenance and is designed to last the life of your pet.

In NSW, all cats and dogs, other than exempt cats (Born before 1999) and dogs (changed, a working dog used for tending stock on a rural property or a greyhound currently registered under the Greyhound Racing Act 2009), must be microchipped by 12 weeks of age or before being sold or given away, whichever happens first.


All cats and dogs, other than exempt cats and dogs (as above), must be registered by six months of age. The registration fee is a once-only payment, which covers the cat or dog for its lifetime in NSW, regardless of any changes in ownership. You are encouraged to have your cat or dog desexed before registering it.

Discounted registration fees apply to desexed cats or dogs. Having your cat or dog desexed prior to registration helps to reduce straying, fighting and aggression and antisocial behaviour, such as spraying to mark territory. It also helps to reduce the number of unwanted pets born each year. To find out more go to https://www.olg.nsw.gov.au/public/dogs-and-cats/responsible-pet-ownership-program

Changing your details.

You can update your pet’s details on the Registry (www.petregistry.nsw.gov.au) or over the counter at your local council. Alternatively we keep change of ownership forms here in the clinic if you would like to fill one out we can send it away for you.