A lot of indoor cat owners must be feeling guilty about depriving their kitties of exercise, because a Kickstarter campaign raising funds for a cat exercise wheel has raised over $250,000.  One Fast Cat is a product that lets cats run on a stationary wheel. Creator Sean Farley based the concept of the cat wheel on his theory that being kept indoors suppresses a cats’ natural desire to run and hunt. One Fast Cat is designed to help cats meet at least part of that need by expending energy.

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