I think that your hamster is sick. Passing away is not the real issue here. Yeah! This seem so the appropriate approach. Take him to your vet and consult him about your dearly loved pet's health.
My Hamster Is Not Moving Around To Well And Is Eating And Drinking A Lot Less. Is She About To Pass Away?
I think your hamster is just sick. I don't think she is about to pass away. But if she feels cold,she must either be hibernating or dead.I hope your hamster gets well. I'm a big lover of hamsters.Good luck.:)