Bulls generally seem to get very close to the fence to jump over, and then lift up at a steep angle and pop over, their nose and then their chest and front legs and belly and their ah - other body parts, all touch the fence. If you can get your hot wire at nose height you may just hit on the...
I would get the barb wire back from him and put it up myself, and put a hot wire on the top of it. I think you should go over to the fence line and watch HOW he jumps it so you can tell how to modify your fence.
I've seen people put up a second line of fence close to the first and very often a...