I just found out that my parents had to put one of our cats, Sunny, to sleep. He was an old kitty. We called him Skelator because he was so skinny. We also joked that he was too old to die. When I left for Germany, I think he was going deaf, too, because he meowed so loudly. It was crazy. He was pretty old. Maybe 17 or 18 I think.
He had a good life with us - warm beds and clean laundry to cuddle in; lots and lots of yard to hunt mice in; all the Meow Mix he could eat; soft food when he was too old to eat the crunchy kind; and blankets to burrow under when was really skinny. He also survived feline leukemia!
It was for sure his time, but I will definitely miss him.