There's really nothing to do for him, since I love the rat, but hundreds of dollars to have his thinger lasered off is not really in the cards, especially not since he's older and the anesthesia alone might do him in and there probably isn't even enough extra skin on his face to cover the gaping would that would result.
sigh, rats. they are little heart-breakers.
anyway, so I have stuff to rub on his face so it at least doesn't get infected. He's still eating and shuffling around like usual, so it's just wait and see for now.