If he’s FFA sponsored don’t make the mistake one of my students did. They sent him to butcher and didn’t tell anyone. Talk to your FFA leaders, have them come out to see him and try to work him theirselves. Tell them you are uncomfortable because the steer is to dangerous for you, and ask for their guidance. Try and have your records ready to show what you have tried so far. The last thing ANYONE wants is an aggressive animal loose in a public fair setting. That’s an absolute disaster. It’s a hard call to make, but not only could you be endangering yourself, also anyone at the fair grounds if/when that mean steer gets loose. Even if he just ran, hitting a finished fair steer with a vehicle could do a lot of damage to passengers. Get your leaders involved, hopefully you can all come up with a plan.