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The Device of Obedience is my dog training collar, modified to fit a much smaller dog. I find it effective at ranges up to a few hundred feet. If Pet is slow on his feet, then the intensity can be raised accordingly. He then moves faster. I do not use the Device of Obedience when he is on the scaffold, forty feet up, or when he is bringing me my freshly ground and brewed morning coffee. Twouldn't be right. If I hear any complaints, the intensity is turned up. More complaints, or a less than happy expression, causes the intensity to go up. Eventually complete obedience is achieved. I give this training tool ***** stars.
No harm or injury was suffered by my Pet in the performance of his duties :)