Can't say that I've ever have really seen the highway look in the yard where the dog knows to stop. I do know alot of dog fence owners overtime stop even turning it on because the dog will not even test it once they are use to it. I forget what model locater it was that 3M makes but you want to talk about picking up anything from phone to dog fences and everything in between that locater did it. Always dead ass on depth too!
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