Treat-dispensing cat ball

Bored cat? Hungry cat? Give that rascal something to do with this treat-dispensing ball.

https://www.youtube.com/watch?v=sGCpjTjRQ9I&feature=youtu.be

This was inspired by the Food-Dispensing Cat Toy by BrianEnigma. https://www.thingiverse.com/thing:40425

I printed one of those, and my cat liked it, but it was too easy for him because it dispensed a treat every time it rolled over. I thought I would make it more challenging for him by making it a sphere. Now he can push the toy in any di