The Steps of Goat Aggression

[Erikthviking]

Update: We were showing some progress until today when he sneak attacked me. Worst fight yet. I finally got his head on the ground and held it there until about 2 minutes after he gave up fighting. He seems like he may still be advancing the aggression. For background, we got him about 5 months ago along with an unrelated doe, wether, and 2 doelings. Being a newbie, I missed a lot of the signs like rushing the gate etc. The buck was very friendly until rut season started. Currently all the goats are kept together, and the buck has an apron that he wears all the time. Since he has increased attacks, my next step would have to be cattle prod, unless someone has a better idea? My intention is to raise goats for food, so these are valuable lessons both on here and out in the pasture with the buck. Any help is appreciated.