Back in the '70's Outdoor Life published an article about this, I'll spare you the details which are lengthy, but the bottom line is if you can supply a very high voltage/low current electrical shock to the affected area you'll be good to go. Back then people like professional snake "milkers" used a spark plug wire. Nowdays, we have dog shockers and/or stun guns. I think this subject was revisited back in the mid '80's by the NY Times in a doctors column. You could prolly google it and find it.
