We have an invisible fence and one day I came home to see that Dozer must have slipped his collar. I got a message next day from PetLink to say he was found. Someone took him to the same vet we take him. It worked out really great. I didn’t think anyone would think to do that so quickly, I was shocked! McDonalds is the only place in town, so we made the exchange there and Dozer was back within 24 hours. The microchip is a great product.