My last hamster lived a FUCK long time, took like 3 tumors to take him out.
My mom killed all three of our hamsters.
She killed the first with diabetes; she kept feeding him all this unhealthy stuff, and eventually his hind legs fell off
She killed the second by giving him a "bath"; he died of what I assumed to be hypothermia shortly afterwards
She killed the final by losing him; he escaped her hand and then got into an open vent we were having repaired. We never saw him again, and it's likely that his dead body is still in the vent, burning.
