Given the task definition and input, reply with output. You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

I bought this to keep my Japanese Spitz occupied, no good. I don't know if it's too difficult for her or if she's just not interested in working that hard for food. She's good for a few minutes then gives up even though she'll get food from it.
Negative