I don't know what to do, or whether to do anything. I have just taken in my mother's cat, Cinders, as she is no longer able to look after her (she is 93 and has to care for my father, who has dementia). In order to come to France, my mother took Cinders to the vet and got her a pet passport and her rabies shots, which are not normal for a UK cat unless it is travelling. But the vet microchipped her for the passport without checking (or maybe she did, and my mother didn't understand, which is possible) whether she had already been done, which she had been when she was adopted from Battersea Cats Home. And she put the new number in the passport.
It is very unlikely that Cinders will ever move again; as far as I am concerned she is here for good. And she is an indoors cat - at my mother's house she ventured a few feet into the garden if my mother was out there, and then rushed in again, so she will not go out here. But if there were need to identify her for any reason, what would happen? Should I put both numbers on her passport and register them with the vet? Would a scanner pick up both numbers automatically? I have never heard of this happening before!
It is very unlikely that Cinders will ever move again; as far as I am concerned she is here for good. And she is an indoors cat - at my mother's house she ventured a few feet into the garden if my mother was out there, and then rushed in again, so she will not go out here. But if there were need to identify her for any reason, what would happen? Should I put both numbers on her passport and register them with the vet? Would a scanner pick up both numbers automatically? I have never heard of this happening before!