I know what you're up against because I've had more than my share of the treachery of bobcats. They are clever and they keep coming back.
I think you're on the right track with the idea of using bait. I also have hot wire around my coops and runs, and while the hot wire baited with peanut butter took care of the bears, I needed to figure out how to bait it for a cat.
Obviously, fish is a good bait to use for a bobcat, but how to attach it to a hot wire so that a bobcat can get the full "flavor" of the electric charge. What I did was to take a five inch square of hardware cloth, folded it into a "taco", and I slipped a fish into it. Then I took some thin metal wire and attached it to my hot wire (with the charger turned off, of course). I repeated this "metal fish taco" at intervals of every ten or fifteen feet around my run. Then I charged the wire again.
Yes, it was a smashing success. The bobcat fell for the bait, tried to take the fish and got a 10,000 volt message. I haven't had a bobcat problem since. It's been years now since I've seen a bobcat around my place.
Unless, you're compelled by vengeance to shoot the cat, this is an effortless, surefire way to deal with this problem.