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Wondering if a sonic training whistle of some sort might allow me to do some association training with the dog, since the owner doesn't seem to be interested in correcting the behavior. Any thoughts? Not interested in any of the "As seen on TV" gimmicks, and I can't try a shock collar like I used (very effectively) with my own dog, it has to be something I can do from my neighboring yard.
Any ideas or links to proven products would be much appreciated!