Quote Originally Posted by Addie
I have had him for uhhh, probably 6 months now...He used to be nice until his mate died. He used to let me hold him all the time. He just recently got moved into a new cage... maybe that's why.
That could be exactly why -- a change of environment. How long ago did you move and/or change cages?? Every time after a "major" change like that you need to give him time to adjust. That's like you packing up all of your belongings and moving to a new house!! It's a little stressful on him.

PS: Please tell me you didn't have two adult hampsters together in the same cage...