How to Handle Bulls Safely and Responsibly

Yes, it would, preferably an area that has a much sturdier fence than a single or double strand of hot wire. First thing you didn't do right was train him on the hot-wire. Second was putting him in a place that wasn't going to hold him to allow him to settle in. Start by studying his flight or pressure zone when he starts reacting to your presence. In a 10' x 20' pen he can't get away from you, and he's acting in a way that is defensive to him towards you, the threat. Start by working with him from outside the pen, or the bigger corral, training him with pressure and release. Look up handling cattle by Bud Williams to get started on proper handling of cattle, which does not exclude bulls.

Get rid of him. If those are his daughters he's trying to get at to breed, he needs to go. Get a neighbor to help load him and ship him to the sale barn if need be. It's no use keeping a bull around that won't respect fences or is proving too costly to keep.

First, consider whether there's anything you may be doing wrong, unconsciously, that is instigating their aggression. They could be in a pen that is much smaller than their flight zone, and you are invading that flight zone when you walk into their pen. They may be dairy bulls that are going to be aggressive no matter what you do. You could try to spend more time with them: read to them; sit nearby, just outside their pen, and talk to them. It will take time and patience to get them to realize you aren't a threat.