The Silent Spinner is not a good hedgehog wheel, the slits in the running surface can grab onto a toe or toe nail and cause injury. I think there's also a problem with them actually tipping over when the hedgehog gets bigger. When shopping for a wheel, find something that doesn't have any slits (openings) in the running surface or giant openings on the side, nor any cross members on the wheel itself (aka lawn mower blades). The Carolina Storm by LarryT here is a good wheel, its huge but glides with little effort. If its too tall, he could probably make you one that sits as low to the ground as possible, and then include the regular upright section for when the hog gets bigger.