The key concern underpinning microchipping arrangements is to ensure that dogs are identified and can be quickly reunited with their owners if they become lost. A dog microchip has limited functionality due its small size and, since it contains no internal power source, it cannot, on its own, lead to the reunification of a stray dog with its owner unless the 15 digit number is recorded on a database that can be easily located. Likewise, the owner of a dog involved in killing sheep cannot be traced unless a robust microchipping system is in place. A number of databases are operational in Ireland and I am satisfied that there is adequate competition in the market place in Ireland. However, my Department is currently reviewing the legislation relating to dog microchipping.