As collar tags are easily lost or removed, for many years pet owners and animal breeders have used  tattoos  as a more permanent and secure way  to identify pets. Unfortunately, the use of tattoos is not a foolproof method. Let's say, for example, that your dog got lost. Someone finds him and takes him to an animal shelter. Upon arrival, he is disoriented and possibly frightened. The shelter worker quickly notices the twisted metal ring dangling from the collar where the identification tag used to be. When she tries to check if the dog has a tattoo, he growls and squirms. Its fur is matted and the employee does not see the small series of numbers located near its right hind paw. As this is not an uncommon scenario, people have been trying to discover other identification systems. You  microchips  are one of the most modern and popular systems. 

similar to  bar codes  and  magnetic tapes, microchips are a form of  automatic identification technology. Generally, these microchips are used to store and transmit information specifically related to something or someone. They can be  implanted, either by injection or surgical procedure, temporarily inserted or simply attached to an object. How to use signals  radio frequency to relay the stored information, they are known as  radio frequency identification  (RFID). 

According to leading manufacturers,  microchips used in pet identification and recovery are programmed to store an identification number  unique and permanent. The chip is a  antenna  are sealed in a  capsule  biocompatible, airtight, made of glass. The entire mechanism can vary in size from less than 1 cm to almost 3 cm in length. The average microchip is approximately the size of a grain of rice. The device itself does not contain any  battery, and its electronic circuit is activated only when it is being monitored. 

the method of  deploy  microchipping is very similar to giving a vaccine. A sterilized applicator is used to inject the microchip just under the skin at the back of the dog's neck, between the shoulder blades. To avoid the  migration  (movement of the original implant site), a company uses a patented covering to promote  unity  between the fibrous tissue and the microchip capsule. 

After the microchip is successfully implanted, it can be "read" using a scanning device. The scanner emits a low-frequency radio signal, activating the microchip. The microchip then sends a unique identification number back to the scanner. After decoding the information, the scanner displays the number on its  LCD. The number is then entered into a  database, along with the  appropriate contact information. Programs such as the American Kennel Club (AKC) Companion Animal Recovery (CAR) maintain worldwide databases so they can help return lost pets to their families. According to the American Kennel Club's CAR program, more than  900 thousand pets  and companion animals were registered in their databases, which includes tattooed animals, and almost  50 thousand pets  were returned to their families.