We routinely use this poly wire and a few step in posts to break up our pasture. Very simple to use with a reel and does the job more times than not.
I would not recommend as a perimeter because it doesn’t always get the charge that we get with netting or tensile. That being said, as long as there is ample grass, the sheep don’t even test it and it serves as more of a physical barrier. #homesteading #sheep #permaculture #carnivore #grownostr 
I’m about to utilize this two strand setup as the 4th side of my paddocks. The other 3 sides being electronet. The only thing I’m nervous about is predators getting past it as I don’t have guard dogs and the electronet is my predator protection at the moment. My thought is if the coyotes shock themselves at least once in the lower wire that should keep them away for good.
Given what you’re working with - I would suggest considering an additional strand or two. If a coyote really wanted to it would go right through or over two strands depending on height and spacing.
Obviously the hotter the charge the better. You may also want to put something like a game camera on that side. I would get them out of there or come up with another solution as soon as you see activity. Best of luck!
