Nice. Good low-cost alternative to the cattle fence energizer.
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Funny story: my son had a little old mutt, who was the horniest dog I ever saw. Whenever there was a bitch in heat within a two-block radius, that dog would sit in the fenced back yard and howl continuously.
Finally, when his hormones took full control, he would try to climb the fence -- and got pretty good at it. So, I tacked chicken wire all around the inside of the fence -- and connected my "Zapper" to it.
That caused lots of yelping -- and soon brought fence-climbing to a halt. But that dog soon discovered he could tunnel under the fence!
So -- I ran a wire along the bottom of the fence where he squeezed under -- and soon was rewarded with a big chorus of pained yelps!
But "Love (or lust) conquers all"! When his horniness went offscale, I would hear a long series of yelps -- then, silence.
So I put the dog back in the the yard -- and watched... Almost immediately, he "made his break" again: about fifteen feet from the fence, he would start yelping -- in anticipation -- then yelp continuously as he squirmed under -- and then yelp for half a block as he ran away.
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In admiration for that level of determination -- I just started leaving the gate open... '-)