LOL cruelty, I have been zapped by one of those fences myself on a school excursion when I was about 14, we had to crawl under it, and me being a fat ass didnt help and my back touched it as I was under it, it threw me to the ground like a firm kick, I cant imagine it being any worse than a firm slap to the dog, aggressive but not exactly cruel. Incase color indicates anything this one was fluoro orange.