Well, is your hamster breathing? If is hibernating, you really can't tell unless you wake it up. My hamster gets angry when I do that though so I don't o.o
How Do You Know If Your Hamster Is Hibernating Or Sick?
When a Hamster is hibernating it plays dead for a few hours or days. BUT STILL BREATHING.
If your hammy is dead, poke it with a stick or if it is cold and stiff, BYE BYE HAMMY.
If your hammy is dead, poke it with a stick or if it is cold and stiff, BYE BYE HAMMY.