It looks like only the biggest baddest choppas can bully a troll into obedience

How would you go about breaking a troll? It must be cruel and treacherous.
Imagine if that was the white lion equivalent, and it could throw you like a stone. But alas these are river trolls so I don't think they do the lobbin best.
I thought I saw a boar breaka around or something boar/orc related. I wonder if breakas are just beast tamers and start out small and work their way up to trolls.
Thought I would share.