Instruct: Classify an Amazon review into positive or negative sentiment.
Query: If the dog doesn't like it, why spend $ on "Natural"

My toy poodle loves to brush his teeth. He jumps right up. I have previously bought more "commercial" products on Amazon and at pet stores. I decided to try this "natural" toothpaste peanut butter flavor. My dog does not like this "natural" product. I wasted my money. No matter how natural anything is, if it doesn't work, it's not worth it.