yup, I did this with Happy, but you dont reward the dog for showing agression, you keep an eye out for other dogs and when you see a dog you take the dog aside and start handing out treats BEFORE she shows any signs of aggression, keep her attention on you, and everytime she looks at the other dog without barking or snarling or whatever, treat immedietly. however you do need to stay outside your dogs comfort zone, so for the first while you do this it will have to be cotrolled, if the dog starts acting up then you are to close for comfort, and you need to back up, the comfort zone will slowly shrink the more you do this. when I did this with Happy, her comfort zone shrunk rather fast, she went from no closer then 40 feet away from the other dog, to walking 4 inches away from him.