Earlier this month, we put our kitty Six to sleep. She had tummy problems pretty much since the day we got her, and while we tried a few times to take her to the vet, she was so hostile they couldn't even take her temperature. It was a very gradual process ... she lived almost 13 years ... but Robin started noticing that she was getting worse, having trouble jumping on the couch, things like that.
She was probably the most bizarre cat we ever had, so as Robin pointed out, we have lots of memories of things that she did. She didn't take much to others ... our grandson calls her "The Bad Cat" ... but she loved us, and that's good enough.
Her sister Boomer and her arch enemy Starbuck are still around to fill our cat-related lives, which is good.