Our 15 year old calico, Ginger has mellowed considerably. She was a holy terror in her youth. She could jump from the floor to your shoulder - but she's too chubby now to do that. Our 14 year old, orangie, Louis has discovered the cat fountain of youth and still looks like a young cat. He sleeps more than he did though. Our 9 year old, Krissy, also sleeps more than she did.