we had gracie micro chipped as soon as she was big enough (10 weeks I think ) but do lost cats ever get reunited with owners even with these fitted? I had misconception they were fitted with some kind of gps tracker however alas no ! So if she ever went missing (she's an indoor cat however managed to get out once), your reliant on somebody finding her and taking her to vets to be scanned! I'm terrified of losing her already (only been 8 months). She manages to pull collars off so having a tracker on that won't work ! Are they any closer to inventing gps microchips do we even know?