Yep, that fence is quite likely hot. Easy way to find out (without pain), pick a blade of green grass, touch it to the potentially hot wire. If the current's on you'll get just a tingle, if not it's just a wire.
As a hiker, I am always on the lookout for these to make sure I don't touch them! My cousin had an unfortunate incident when he was in the wilds of Austria and had a call of nature. When said fluid touched electric fence, he had an eye watering unpleasant shock!!
A shocking addition to your enjoyable fence posts series :)
(I will happily take whatever punishment such I terrible pun warrants - I just couldn't seem to help myself)
(I will happily take whatever punishment such I terrible pun warrants - I just couldn't seem to help myself)