I was helping with an agriculture project in Burkina Faso they needed a fence around the irrigation project to keep the goats,children and everyone else out so you could actually get a crop, we sent a 12 volt 25 mile fencer, the manager thought the electric fence should be on the inside of the chain link fence to keep the kids from stealing the insulators, they were adamant that that little wire was a waste of time...we let him test the fence first.....no one would go second... all the small farmers wanted to know how much it cost and where they could get one