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'm a fan of Greenies for dogs. However, this size is just too small and almost immediately snap in half. The issue with that is they end up chewing each 1/2 down to a size that is easy to gag and choke on. Part of the advantage to Greenies is that they're supposed to break down to tiny bits that are easily swallowed. These breaking in half defeats the purpose. For puppies and even for grown up tiny dogs I recommend going one size up.
Negative