If your cat already enjoys running on a wheel, you'll probably have more luck ... lines on both plywood pieces at 2-1/2-in. intervals (if using 1-in. dowels). Use the 1-in. Forstner bit to drill ...

[Scott Cutler] has a young cat, [Cygnus], that loves to run on a cat wheel and [Scott] had some some important questions about [Cygnus]’s usage of the cat wheel like, how often it’s used ...