Give it work till it gets sick of it, and then give it some more, try and channell the agression into something that's been bred into it for generations, and by the way, I doubt you'll give it enough work that it gets sick, unless its " hors de combat" as Mr Plummer used to say. But I think you'll always have to be mindfull of its habits if thats what lights it lemon. All the best with it.
WAB
PS
Give it some more work after that as well