my brothers dog went missing on 26th march, we looked round every where and called round every where. my brother didn't bother calling the vets as izzi is chipped. well on sunday he rang the bath cats and dogs home. Izzi had been handed in up there, my brother asked why they didn't ring him as she's chipped and they told him that the microchip had failed and couldn't be detected. So just a heads up to all the dog owners out there. Microchips can fail at any time. Make sure your dog always has a collar on with a tag. The tag must have your number and have i am chipped on it.