[header] How to make dwarf hamsters stop biting the cage [title] Let your hamster play more. [step] Let him roam around on you, on your bed, or in a hamster-proof area. Exercise may help work out the boredom that your hamster might be feeling. 
[substeps] An exercise ball is an excellent way for your hamster to get exercise every day, while also protecting him from potential household hazards. Just be sure to supervise your hamster while he's in his ball.