Problem with my mouse?

[kel83]

My little mouse has suddenly started holding her head at a pretty severe angle to one side, like if you put your head to your shoulder. She just started doing this out of the blue, could she have hurt her neck, or is it a neural problem maybe? I had a rat a long time ago that developed a brain tumor, I don't remember if he favored his head to one side though. She's been doing it for about a week now, even when she's sleeping or when we hold her. Any ideas on what's causing this?

[lovely honey]

i had an iguana that did that about a month later he died!