I had a couple feisty ones that were younger and for one it was a series of events which took more time to overcome. First was a new home with me, then he went into shed, then I moved him from QT to a permanent home upstairs so it took a while before he stopped being strike happy. I just had to leave him alone for a coupe feedings then pick him up as if nothing ever happened. He would even strike the plastic tub really hard if I was near it.