Bobby got a shock from an electric fence whilst out on a group dog walk, off lead, last Saturday. I didn't actually see it happen, the first I new was on hearing a loud yelp, following which he ran berserkly round the field at top speed yelping and screaming his head off. To my surprise, he came immediately to me when I called and I was quickly able to calm him down. He walked with his tail down for about the next five minutes, then got back to normal. No lasting damage.