I have an electric fence at the bottom, for the groundhogs, rabbits and raccoons.
Electrifying the top would be useless. Ever see birds sitting on an electric fence strand? They're not grounded, and neither is a deer 8 feet off the ground.
Anyway, I couldn't electrify the top without making the whole thing sturdier and more permanent... and I'm sure that doing that would keep the deer out without electrification. I could even do it with 10' PVC pipe the same as I have now, except I'd have to spring for larger diameter pipe that would be more rigid. I've just been balking at the price, which is obviously stupid.
Speed comes from what you put behind you. - Judi Ketteler