Have Cat Questions? Ask a Cat Vet Online.
Hi! I'mCustomerand I can help with your question.
I have an idea of something that might work. It's true that without being able to use food as a motivator you do have quite a dilemma.
Get yourself a little laser pointer and play with him with it for a while to get him hooked on the concept. Then use the laser pointer to lure him into the wheel by shining it onto the upper inside of the wheel where you want him to put a foot to get the thing rolling. Keep it pointed there and hopefully he will keep running toward it.
If you want to try this, let me know how it works out.