Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works great on small dogs to stop barking

Both of my small dogs, (one is 6 pounds, the other is 12 pounds), were driving me nuts with their constant barking at everyone and everything. I tried the dog trainer/bark stopper on them and by the second day they stopped barking every time I clicked the button. It's been over a month now and all I have to do is get the device out and my dogs stop barking. This is a great training aid and I recommend it to anyone with a small dog.