Can you please show a picture of this?Haley and others.......I have one segment of my chicken yard fence that was placed about 1 foot inside a woven wire livestock fence. It sets on step in insulated posts, and was no more expensive.....along with being easier to maintain and build....... than hanging insulators on the steel posts that holds up the woven wire. If a german shepard tried to crawl under my fence, his nose would come into contact with the electric fence about the same time as his front shoulders were under the woven wire fence.
In practice, it is brutally effective for any animal coming through or under the fence. They get trapped in there and will get repeated shocks before they can get clear of it. Will not physically harm any of them, but will assure nobody tries it twice. I have seen several dogs get it.....and the response is always the same. Loud yelp, followed by dog sprinting for the horizon as fast as their legs will carry them.
The net effect is the neighbors dog will no longer be interested in chickens. My neighbors dog took an interest in my birds early on, got zapped and even now, if it is out with the owner....whose garden is less than 50 feet from the fence......and birds just on the other side of the fence, it looks the other way. Wants nothing to do with them.