LovesBach
Sort of on the same topic; if you have your cat chipped, do check that it has been properly inserted. We had our huge black tom cat chipped, and he fought and struggled. Later that day a friend was stroking him along the spine, and her finger became tangled in a short thread; checking it we found the microchip attached. Had she not done that it would have fallen off, probably in the garden, and we would have been none the wiser. The vet reinserted the chip, but sadly he was killed by a car about six months later. Ironically a vet found him, and was able to tell us - without that chip we would have not known what had happened to him.
Sorry to hear that, we've lost a few to the road here and it's getting busier. We miss our friends because that is what they are to us, best wishes, I hope you can think of getting another cat they're great companions.