Thanks so far...
I do try to play with her, but she's not really into vigorous play for more than 2-3 minutes anymore (not enough to work up a "sweat" anyway)!
As of her last vet visit she's all fine, thiroid checked out, just heavy... has been gaining slowly for the past 2-3 years. I will ask a local store, good idea... my vet still says Science Diet
Lastly - I tried her on Innova EVO for a couple of months... but couldn't stand the litter box stench!
Further tips still appreciated!!