Yes, both of mine have been microchipped. It was part of the adoption "contract" I signed when I got them. At first I was hesitant to do it, but I don't like putting collars on my kitties so decided to have it done. Also being in the legal profession I wanted to live up to my end of the contract. They are both indoor cats, but living in earthquake country, anything can happen and if we ever get separated for whatever reason, I want to be able to be reunited with them.