The cost of having this put in your pet is costly but what you aren't told is that there is an annual fee of $21.99. If you don't pay this then if your pet were to get lost, it would cost you $75.00 to have them find your pet. It seems like a business that is taking advantage of pet owners who are trying to help their pets. I'm very unhappy. My previous dog had a microchip that did not have an annual renewal.