I know the sense of nervousness that comes with aging pet.
My rottweiler just hit his 8 year and now is getting too tired to do pretty much anything.
He was always a lazy one actually but now the laps are longer, the barks are lazier and the whines are far louder.

He could just walk up, rest on my lap and sleep there...

It's both calming and disheartening cause where's the boy that wouldn't rest till I run with him or throw the ball?