Thursday, October 23, 2008

Microchip implant (animal)

A microchip implant is an identifying integrated circuit placed under the skin of a dorg, cat, or other animal. The chips are about the size of a large grain of rice and are based on a passive RFID technology.
Tattooing is another, older method for identifying animals.

Uses and benefits
Microchips have been particularly useful in the return of lost pets. They can also assist where the ownership of an animal is in dispute.
Animal shelters and animal control centers benefit using microchip identification products by more quickly and efficiently returning pets to their owners. When a pet can be quickly matched to its owner, the shelter avoids the expense of housing, feeding, providing medical care, and out placing or euthanizing the pet. Micro chipping is becoming increasingly standard at shelters: many require all out placed animals to receive a microchip, and provide the service as part of the adoption package.
In addition to shelters and veterinarians, microchips are used by kennels, breeders, brokers, trainers, registries, rescue groups, humane societies, clinics, farms, stables, animal clubs and associations, researchers and pet stores. Animal control officers are also trained and equipped to scan animals.
Several countries require a microchip when importing an animal, as a proof that the animal and the vaccination record belong together.
Microchip tagging may be required for CITES-regulated international trade in certain rare animals; for example, Asian Arowana are so tagged, in order to ensure that only captive-bred fish are imported.

System of recovery
Effective pet identification and recovery depends on the following:
• A pet owner either adopts a pet at a shelter that microchips some or all adoptee animals, or the owner with an existing pet brings it to a veterinarian (or a shelter) that provides the service.
• The shelter or vet selects a microchip from their stock, makes a note of that chip's unique ID, and then inserts the chip into the animal with a syringe. The injection requires no anesthetic.
• Before sending the animal home, the vet or shelter performs a test scan on the animal. This helps ensure that the chip will be picked up by a scanner, and that its unique identifying number will be read correctly.
• An enrollment form is completed with the chip number, the pet owner's contact information, the name and description of the pet, the shelter's and/or veterinarian's contact information, and an alternate emergency contact designated by the pet owner. (Some shelters or vets, however, choose to designate themselves as the primary contact, and take the responsibility of contacting the owner directly. This allows them to be kept informed about possible problems with the animals they place.) The form is then sent to a registry keeper to be entered into its database. Depending on regional custom, selected chip brand, and the pet owner's preference, this registry keeper might be the chip's manufacturer or distributor, or an independent provider. In some countries a single official national database may be used. The registry keeper typically provides a 24-hour, toll-free telephone service for pet recovery, good for the life of the pet.
• The pet owner is also provided the chip ID and the contact information of the recovery service. This is often in the form of a collar tag imprinted with the chip ID and the recovery service's toll-free number, to be worn by the animal.
• If the pet is lost or stolen, and is found by local authorities or taken to a shelter, it is scanned during intake to see if a chip exists. If one is detected, authorities call the recovery service and provide them the ID number, the pet's description, and the location of the animal. If the pet is wearing the collar tag, anyone who finds the pet can call the toll-free number, making it unnecessary to involve the authorities. (The owner can also preemptively notify the recovery service directly if a pet disappears. This is useful if the pet is stolen, and is taken to a vet who scans it and checks with the recovery service.)
• The recovery service notifies the owner that the pet has been found, and where to go to recover the animal.

Many veterinarians perform test scans on micro chipped animals every time the animal is brought in for care. This ensures the chip still performs properly. Vets sometimes use the chip ID as the pet's ID in their databases, and print this number on all outgoing paperwork associated with its services, such as receipts, test results, vaccination certifications, and descriptions of medical or surgical procedures.

Implant location
In dogs and cats, chips are usually inserted below the skin at the back of the neck, between the shoulder blades on the dorsal midline. Continental European pets may be an exception; they get the implant in the left side of the neck, according to one reference. The chip can often be manually detected by the owner by gently feeling the skin in that area. It stays in place as thin layers of connective tissue form around the biocompatible glass which encases it.
Horses are micro chipped on the left side of the neck, half the distance between the poll and withers, and approximately one inch below the midline of the mane, into the nuchal ligament.
Birds' microchips are injected into their breast muscles. Because proper restraint is necessary, the operation either requires two people (an avian veterinarian and a veterinary technician), or general anesthesia is administered.

Animal species
Many species of animals have been microchipped, including cockatiels and other parrots, horses, llamas, alpacas, goats, sheep, miniature pigs, rabbits, deer, ferrets, snakes, lizards, alligators, turtles, toads, frogs, rare fish, mice, and prairie dogs -- even whales and elephants. The U.S. Fish and Wildlife Service uses microchipping in its research of wild bison, black-footed ferrets, grizzly bears, elk, white-tailed deer, giant land tortoises and armadillos.
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