I’ve read tons of post where the predator goes right through the fence even after being shocked. I’m not willing to take that risk and definitely not willing to spend tons $$$ for something rated for larger animals. A large (20-25lbs) male raccoon killed one of my girls and severely wounded three, leaving me the horrible task of putting them all down. I was able to trap him a week later and promptly dispatched him. We believe that this also was the coon that killed three of our chickens a few months earlier. Unfortunately, you can’t trap them all so I’m going with your design.