Porcupine? Jerboa? Hare, instead of a bunny? another species of rats is acceptable.
This game needs a Raccoon tho. (yes i know it's no rodent)
or something like this: http://t1.gstatic.com/images?q=tbn:ANd9GcSGngyAV3SuuVBt6dXhnOu7bHSEiDVbvZWfyUotuZoR8P3ljcZFPg --- Surprise! It's me again! \('o ' \ ) "You could easily teach yourself if you observe the world closely." - Elise