Far Cry 5 - Ignoble Beast Trophy Guide / Achievement Guide - Kill a bison using only melee weapons (Campaign only) [Bronze]

Go to the bison hunting spot shown in the video. There will always be some bisons in that general area. Be sure to bring a melee weapon such as a metal pipe or aluminium bat.

The easiest option is to consume the homeopathic "The Furious" from the utility wheel. This boosts your melee damage and will kill the bison in one hit.

If you don't have this it's still easy enough.
Just attack the bison with the melee weapon until it dies.

Put the difficulty on easy for this. It only took me 17 hits with a metal pipe. Try to stand behind the bison so it can't attack you. If it moves around, move the other way to stay out of its attack radius.