Our cat, who we'd had for ten years but was an adult already when we adopted her, so we don't know how old she really was, just passed away last December. She was going downhill the last month with heart problems, and part of the treatment while we were hoping she would recover was to get fluids administered under the skin daily, which involved a needle and an IV, and it took two of us to do it and she had to sit still and put up with it for about ten minutes. Unfortunately she got worse and finally we had to do the right thing by her, though it was hard. First pet we've had to 'put to sleep'. I have to say though, she was a good little patient and put up with the daily fluids and medicines she had to take. She'd always been a little stand-offish, I think she kind of liked all the attention towards the end.
Now that we're getting to travel a little more though, we are trying to resist getting another cat. I can't imagine travelling with a cat and the dogs. I'd be afraid the cat would sneak out and get lost while on a trip. Keeping track of the two dogs is enough trouble.