Hmmm Ok:-) Another option is "Major Kitty Excercise" Zorro likes to chase the little red laser light jumps on the walls trying to get it all over the floor, he lost 5 lbs since I bought the little laser light...He's de-clawed, fixed and stays indoors, so they tend to get a bit lazy and fat sometimes...
You gotta love-em! :-) Zorro is 15 pounds..Viking sounds very big!
The vet wants him to exercise, so the laser light sounds like a good idea. He's 24 pounds. Big kitty!