Ah right. I have unintentionally taken on cats like that then, I always seem to pick cats that end up having health problems, but I wouldn't change any of them - the longest a cat has lived in my house so far is 3 years, shortest has been 8 weeks. I have had a cat that developed FIP, one that had liver probs that were untreatable and one that had mammary cancer. Hard, when my cat with liver probs was going through her final illness (she had liver probs for 11 months before it develoed into something worse), I spend the 2 weeks between being told there was nothing they could do and making that decision being extremely upset and barely sleeping. Worth it in my opinion though, as she had already been in a shelter for a year when I got her, so at least she got to spend her last 16 months in a loving home. Same with the cat with mammary cancer - she had had an awful time the year before I got her, and I only took her as she had obvious health and behavioural probs so I knew a shelter wouldnt take her (she was 14) - 6 weeks later we discovered cancer, but we couldn't operate due to her behavioural probs so that was just keeping her comfortable until it was too much - a 2 week period again. She was the 4th cat I had had to make the decision for, but it was the hardest as it was quite a sudden thing, I only had that day to think about it. As hard as it was, I knew I had given her 8 weeks of love and care that she wouldnt have got otherwise.