I don't know how age/activity is related in the Cavaliers. I know my Golden, 7, is good at playing but it is definitely shorter spurts than when she younger.
Freckles is estimated at 27 mo. now and full of energy. I've been seeking another Cavalier as a companion-for me, for him. Today I was offered a 6 y.o. retired female breeder who has all health checks +. She is so sweet. I wonder if it would be unfair to her to have to have a bouncy boy as a companion. I think Freckles can be a bit of a roughneck. If I didn't have such a "crowd" here, I wouldn't hesitate.
Learning new things everyday