How about "Positive" and "Negative"?
OMG!! I am laughing so hard!!! I was thinking of something in a slightly darker vein, but, I love it!!
I have another one -- how 'bout "Leader" and "Legend"? (If you're not a college football fan, that won't mean anything to you.)
Also, CaT would be happy to comply with mouse removal duty -- just move him to California!