Wonder if the domestic dogs learnt to jump while knocking over the can. Our dingoes easily learnt to leap over or between electric fences and when off the ground they don't get the hit. Whereas I have seen a billy goat continually knocked over due to some stubborn idea it wouldn't get him next time or he would win.

I was working at a crystal water supplier & health regs naturally prevented stock entering near the factory. I switched off the electric fence to enable whipper snipping the fenceline when cattle/horses were contained in other paddocks. Some bright SPARK saw the off switch and put it on, zapping me. It happened a couple of times, despite my placement of signage, until I hid the plug under bibs & bobs in that out room. There is no fun in being zapped when the current is raised to exclude bulls.