Hey I am not very good with questions like this, but I have an idea. When Harley pulls on the leash to get at Shiloh, you could try using the penny bottle. That thing is a life saver! Fill a plastic soda bottle with a few pennies and when the dog misbehaves, slap it down on the floor or on your hand really hard. The noise is awful and whatever the dog is doing, it will stop! You could try that if you wanted Hope I helped!