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Obesity in animals works the same way that it does in people (I am assuming that your hamster actually is fat, and that you have not misdiagnosed it on the basis of either some kind of projective anorexia, or pregnancy). If calories eaten exceed calories burned, weight increases. If calories eaten are less than calories burned, weight decreases. If you feed your hamster less it will be eating less calories. I don't know if it has an exercise wheel, but running on the exercise wheel is a way that hamsters burn calories. They cannot be trained to lift barbells.

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15y ago

What else can I help you with?