Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Dog Zapper

Love this product. Now we can keep our dog. We were ready to take it to the pound!It's made life so much easier. We aren't yelling at the dog anymore just a little warning sound and he's an angel. When people come to visit and the dog goes crazy a few little zaps and he's not bothering our guests.We're very happy!