Signs of a hamster dying are a decline in energy and lethargy mostly. They may also begin to be less friendly. How old is the hamster? If it's old, it may be old age. Another thing to check up on is if it's sick. Hamsters are usually robust but if they get sick, they die really quickly. You need to find the problem. Depending on the problem, certain measures have to be taken. But your best bet would be to go to a veterinarian. If you want to at least try to help her yourself first, you should probably go to hamsterific.com. They have all the information on hamster life spans, illnesses and how to treat them. So there is your answer so you welcome and if its you hamster my prayers are with you.