What kind of hamster is Cupcake?
What cage does she have?
And how big is her wheel?
I ask because some hamsters will chew like crazy if they are bored and this is often because their cage is too small and their wheel is too small for them to use.
A dwarf hamster will need a cage that is about 70x40cm with a 6.5 or 8" wheel.
A syrian will need at least an 80x50cm cage and an 11" wheel.
Zooplus.co.uk is fab for cheap cages
I think most of us on HC have at least one cage from there!