we recently purchased electric netting from premier 1 supplies.
we opted for the 48in tall, 164 ft fence with dual spikes. (i thought i ordered the version with extra posts, but looks like i ordered the longer fence vs the one with more posts)
we also chose the black and white to help with the visual/psychological barrier that paul has mentioned, and we have observed with our cow
http://www.premier1supplies.com/detail.php?prod_id=44094&cat_id=0&
I plan on powering it with a patriot energizer.
opted for this one because it can run on AC or DC. I plan to get a 12v battery and smaller solar trickle charger to make the energizer mobile, but always have AC as a backup or when close to mains power.
http://www.premier1supplies.com/detail.php?prod_id=12602&cat_id=170
We are trying to use our chickens to follow our cow to break down some of the manure in the pasture. we have found that we dont get the herd effect from 1 cow and hope this will help that.
We hope to have both items up and working in the next few weeks (ordered a few days ago).
We are in a dry area with heavy clay soil. I havent had any grounding issues with our current energizer and poly rope combo, so we hope that continues with netting.
i will update this once we have used it a bit.
hope this helps.
edit:
corrected fence.