I have a charger that was used for electronet. I was convinced that it was not working effectively (hooked to 12 V deep cycle battery.) I could grab hold of the fence, and barely feel a thing. Then, I tried taking my shoe off, and poking my toe in the damp grass, while touching the fence. UM... yeah, it worked very well. Curled my hair. Point being, the predator should not be wearing shoes, and it is best if his initial meeting with the fence be up close and personal. A dab of peanut butter, or bacon grease would be very effective. My chicks would squirt through the openings on the electronet without getting zapped. Their feet make poor conductors. However, Rocky, and Wiley have soft pads on their feet that make great conductors. Be sure to place the strands of the fencing close to the ground, and every 6 - 8", then every foot until you get as high as the expected height of your target critter. I've been told that an electric fence is only as good as the ground rod(s) it's attached to.