We adopted a rescue kitten with a congenital heart condition, which was found on her pre-adoption vet examination. We decided to continue the adoption even though we might only have her for 12 months. She was a wee poppet and didn’t show any signs of illness until she was a couple of years old. She then had tablets to take, not quite sure what they were, but they kept her going for another 2.5yrs. At that point she became very ill. There were no other options open to us, as surgery wasn’t possible, so we did the kindest thing. It broke my heart and I cried myself to sleep for many nights after.
My son kind of put it into perspective, though, when he said she had been a wonderful pet who brought so much pleasure to us, she was a beautiful star who blazed perhaps briefly but oh so brightly in our lives.
So I’d say, give your cat the best life possible, in whatever you think is the best way. I hope you have him for many years. X