My niece had a huge mastiff/bulldog cross, great personality and folks loved the creature, which loved chasing any small animal and all large trucks. The pound told her the dog leaped thru huge picture window to chase down a truck, and previous owners decided that's it, back to the pound!
My niece decided to take on the project. I told her would take hours every day of working that positive re-enforcement, using the numerous cats we had about the house for the training. And would take months. Hours a day for months. If you want to be humane...or shock collar, or just smack the dog hard as you can across the face several times, with an open hand, and training be done in a week.
Dog was so powerful and strong, she couldn't safely walk it, and of course opted for the humane training - you guessed it, dog had to be returned to the pound...
Here is the beast getting ready to steal a buttermilk pancake....it once ate, in blink of an eye, 2 whole pounds of sausages frying in big pan. I figured the abundance of super hot oil would slow it down, but nope...