Since 1 July 2006, all dogs registered in New Zealand for the first time (except farm dogs used for stock control) must be microchipped. This applies mainly to puppies when they are first registered at three months.
Dogs classified as dangerous or menacing, dogs impounded but not registered and dogs registered but impounded twice are also required to be microchipped.
Microchipping is a more permanent method of identifying a dog than collars and tags which can be lost or removed. Even tattooing is not necessarily permanent as dogs can damage their ears in fights or fur might grow over the tattoo and it might not be seen easily.
A microchip is permanent and, providing it meets the required standards and has been inserted correctly it will function for the life of your dog.
Microchipping was introduced for two main reasons.
It enables a dog to be linked to its owner, so if it is stolen or lost, dog and owner can be reunited, and it can identify a dog which has been aggressive and classified as dangerous or menacing. This is especially important if a dog owner attempts to disguise the dog's identity. 
Done correctly microchipping is a simple, lifelong way to identify dogs and link them to their owner, and results in the speedier return of lost, stolen or injured animals.
Unless the information is recorded on the council data base, the owner is not complying with the law and a dog picked up straying may be rehomed or euthanized rather than returned to its owner. The only safe way to ensure that your pet can be returned to you if it is lost or stolen is to have it microchipped and recorded on the council’s data base which means it will be on the NDD.
Village Vets are happy to provide this service for you.  We normally complete the micro-chipping at the dog’s first vaccinations or when it is booked in for neutering.