She's 15 years old, and has been getting skinnier, and is drinking more (and urinating more) than she used to. I'm worried that she may not be with us much longer. Hopefully it's something treatable, and she can go on for a while longer.
My mother's cat lived almost 20 years, but I have to remind myself that's the exception rather than the rule. The average life expectancy for an indoor cat in the US is about 12-15 years, and Luna's already pushing the outer edge of that envelope.
...and the only way I can tell that she's actually sick is by the fact that her fur looks a bit shaggy--this is a cat who has always looked like she was ready for a show or a photo shoot--and she's favoring one of her hind legs. She's got plenty of pep and her appetite seems unchanged, but she's obviously lost weight...and she's a very slender, athletic cat to begin with.
Anyway, that's in a bit more than an hour, and I have to assemble my excrement. More anon.