MICROCHIPPING YOUR PET
A microchip is a small, electronic chip enclosed in a glass cylinder that is about the same size as a grain of rice.
The microchips presently used in pets only contain identification numbers. No, the microchip is not a GPS device and cannot track your animal if it gets lost.
It is injected under the skin using a hypodermic needle. It is no more painful than a typical injection, although the needle is slightly larger than those used for injection. No surgery or anesthesia is required—a microchip can be implanted during a routine veterinary office visit. If your pet is already under anesthesia for a procedure, such as neutering or spaying, the microchip can often be implanted while they're still under anesthesia.
When an animal is found and taken to a shelter or veterinary clinic, one of the first things they do is scan the animal for a microchip. If they find a microchip, and if the microchip registry has accurate information, they can quickly find the animal's owner.
The best reason to have your animals microchipped is the improved chance that you'll get your animal back if it becomes lost or stolen.