Maybe I'm blind.... but I only see the one hinge, upper left door......regardless that hinge is not touching door mesh and wood is an insulator.
Wonders if you could tie a wire to mesh on hinge side of door to a grounding rod?
That on the upper left is the hook. There's a strap hinge up at the top right and one almost at the bottom right that's hard to see in the picture. I bet you're right in that all that 2x4 fencing there is insulated just being stapled to the door. Maybe I could put a piece of hardware cloth across there at the top of the door and run a wire down to a grounding rod that's out of the way. This is the first electric fence I've ever put in, so I probably need to rethink the whole thing.
