How Long Should I Let My Hamster Spin In His Exercise Ball?

I have put my hamster in one of those clear plastic balls that they can roll around in. The cage exercise wheel drives me nuts because of the noise, so do you think it’s okay if I leave the hamster in the ball for longer than 30 minutes at a time? My computer is in the same room as the hamster, so I would be able to make sure he’s okay, but how long is too long? He bumps into furniture all the time, but he seems to enjoy it lol

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