Yup failed, it was a recent chip, you could feel it. When it was inserted, they scan and show you its reading before you leave the vet, we went back about a month later for the second set of shots and the microchip wouldnt read. We never went anywhere and pup was at home with us 24/7 and a month later it didnt work, The vet said they do just die out and it is not uncommon. We have experienced 3 microchips that died out, all from different vets ( some were done at a pet store during a special ) we have several friends in the dog club/shows that had the same thing. So everyone, if you are concerned about your pet getting lost, always have the chip read when you go to the vet to make sure it still works.