2 of 2 people found the following review helpful
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This review is from: BarkStopper® Ultrasonic and audible bark deterrent device for indoor and outdoor use. (Misc.)
My puppy was barking regularly, at almost anything that moved for a spell. I only used this for unnecessary barking, as I didn't want to supress her natural alert barking, with a verbal cue of "enough" every time I used it. She clearly disliked the noise and stopped barking immediately, proving it worked as we obviously can't hear it. I now rarely use this, but when I do say "enough" and lift it she usually stops without the need to press the button.
It's worth noting though, although it has worked fantastically well for my dog (a west highland terrier), it had no effect on my brothers dog (a jack russell), who stands and wags her tail when you point it in her direction.