Re: Wheel on platform
I keep an eye on hamsters who have wheels in new positions in their cages just to make sure they aren't flying off it and hitting into things, regardless of if it's on a platform. If your cage has bars on the roof or a mesh lid, you may be able to cable tie it to the roof so it hangs above the platform and can turn freely (depending on roof height - you don't want it hanging way above the platform). This would remove the need to any duct tape.
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