When a hamster passes away their eyes will cloud over. If the hammy is clearly not breathing at all, it has passed. A hybernating hammy will have some movement and some muscle tone as you watch it over time. A hamster who has passed will begin to stiffen up too. It would have to be fairly cold for a hamster to hybernate. How cold is it in your house? This has to be so distressful for you.
