Ralph did our dog yard invisible fence for our 2 shiatsu puppies. Our biggest concern was that it would not work for our stubborn, hyper, very fast male, and he would run right past it. our female was already skittish, so we thought it might make her worse. Ralph followed through on his word that the training would be positive and both dogs would learn with no problems. It took a few training lessons for him to make it work, and now we don't have to worry about the dogs when someone opens the door and they go running outside. I highly recommend this company.
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