We got Blue from a charity that my Mum helped with when he was 3 years old (allegedly the promised paperwork never showed up and we didn't care, we wanted a pet not a show cat, but I think it was probably accurate), we had him for 13 years which made him about 16 when he finally succumbed to old age.
Overall I would have said he was as healthy as any of the moggies I have had. When he was about 13 he did need a major dental done on his teeth, in the end he had two done as the remaining teeth still gave problems even after they had been cleaned, he was left with no back teeth but that didn't slow him down or stop him eating dried food. When he was in for the dental work they did do a full blood work on him which showed early signs of kidney problems, of the 3 tests they do for kidney function 2 were borderline bad and 1 was fine (I think that was the way it was, it might have been 2 fine and 1 bad), one vet suggested special food, but another suggested just monitoring it, which was what we did and after several months it cleared up by itself, it was apparently a side effect of his bad teeth.
We never treated him as anything special, he was treated the same as I would any cat, he had access to outside when he wanted it, he was fed the same as the rest, he did like his dried food, but fortunately also like to drink so that never gave a problem. He never had a problem with other cats he met outside, it might have been that he was a big cat to start with and the instinct to puff his fur up when he felt threatened was still there, and made him look enormous. He also had far more human body language and would happily stare at another cat which gave him a very confident bearing so most cats would just back down from him. However he wasn't confrontational and would happily sit and wait for another cat to move if it was blocking his path.
Having had him I would have another in a heartbeat if the chance arose, the only problem is i am happy to let all my cats have access to outside and so many breeders feel that the cats can't cope with it, Blue could and did, I have a friend with a Ragdoll that is allowed out and she copes fine, in the end they are still cats, very placid, laid back cats, but they still have all the instincts left under all that fur and aren't given the credit they deserve.

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