Last year we had to put down our 20+ year old cat. We rescued her from my sister who had to leave her at our dad’s house after her first divorce. The cat’s actual age was uncertain, but I found an old digital camera with pictures of her in 2004.
It was a tough decision to make as she appeared to be fine mentally, but her body was not working. Her joints had become loose and made it difficult for her to control her movements.