Halle actually came, after all her fight rehearsals and gun rehearsals, she would go sit, and work, and play with the dogs for months on end so the dogs on-screen actually obey Halle.
We didn’t want a trainer hiding behind a set piece or a prop or something like that.
So it wasn’t acting like these were her dogs, these actually were her dogs.
We wanted Halle—or, Sofia, our character—to be our on-screen dog trainer.