NuSkin is the medical grade of superglue. it also degrades in water, so you can get it off. whatever you wind up doing, i would recommend (if you haven't already) removing the animal to a "sterile" tub, with a plain newspaper or paper towel bedding so that no cage substrate gets stuck in the wound. if you do use the NuSkin, make sure all bleeding is completely stopped, and that the treatment dries completely before returning him to his cage.
ignorance can be cured, but stupidity is forever