All my ponies are microchipped, and thats because the Dales pony society started it some years ago with the foal. My eldest mare was among the first batch of foals to be chipped, so it must be 11 years ago. I know at one breed show there was someone there checking the microchips by the ring, as sometimes they can move. The good thing is the Dales pony society give a donation towards the owner microchipping, which is a help.