My first and best-smartest-dog-in-the-whole-wide-world Sheba had a prey drive that could not be beat. If it was not human, and not canine, it was fair game, and needed to be killed. I don't think there's any way you can train that drive completely out of a dog that's been born with it. If you end up adopting her out to someone, insist on no cats, no small animals, just to be safe, and warn them why. She is a beauty.

Our neighbors, even those with cats, loved Sheba. Their cats never got too fat or lazy - if they were allowed outside, they quickly learned where all the trees were. And Sheba rid the neighborhood of woodchucks so well they stayed gone almost ten years after she died, and I don't recall ever having squirrels in the birdfeeder when she was around, either!