When I was little, our neighbor had an old cat. He was on the TV show called "That's Incredible", because he lived to be 32 years old. He had failing kidneys and was always filling up with fluid. Our neighbor took him to the vet every couple of months, as I remember, to have him drained. Obviously, it paid off for him. Point being, it doesn't really hurt them to drain them repeatedly, and it can help them live a more or less normal life for a while. Bitsy seems to be doing fine, she's been going outside every day, to freerange. I'm still giving her the Milkthistle, once a day, and Zyfend every couple of months.