I recently bought 2 mice, one is more laid back than the other. more recently the laid back one just doesn't seem right? She just doesn't seem herself and she practically keeps her eyes closed all the time.. I just don't know what to do for her? I was worried initially she may be pregnant as her tummy is really round on both sides where as my other mouse hasn't got this? They are both females and was with other females so if she isn't pregnant, what would be the reason her tummy is so round?