What causes hamsters to be bloated?
If a hamster is bloated you probably overfed it!
some causes of hamster death are... improper handling of hamsters like dropping the hamster from a height which causes internal bleeding and shock and finally death, wet tail, diarrhea, cancers ( includes chewing on metal bars. http://www.hamsterific./CageBarChewing.cfm gives you details), tumors, flu, cold, pneumonia, Respiratory Infection, and sickness related to age. that's all i know. hopes this helps!