Winston was chipped by the Humane Society before I brought him home. Wallace will be getting chipped as well as soon as I find a local vet who uses the same chip. Winston has an Avid chip and I want to register them both with the same company. It's also great because you give them not only your contact info, but also the info of a family member or friend in case they can't reach you. My boys are indoor, but you can never know what might happen.