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.

Example Input: I have a 2 1/2 year old 60 pound German wirehair pointer.  We feed this food during hunting season due to his increased metabolic needs.  He burns so many calories, he eats 8 cups of this food a day (with zeal).  We use the large bites to help keep the tarter and plaque off of his teeth (and to slow his eating).  Due to the high quality of this food, he can keep up his energy, keep his weight up, and recover more quickly from scrapes/bumps from running the field.  Our vet's exact words were, "Your dog is an example of perfect health."  You may think the price on this food is high, but it is worth it.  You get what you pay for.  Also, consider the canned version of this food.  It is a nice way to feed/hydrate a dog after a long day hunting - just give them an hour to settle down first.  On a side note, we feed Diamond Naturals Beef and Rice in the off season.  We have no digestive issues transitioning from one to the other (we switch over a period of a few weeks).
Example Output: Positive

Example Input: I wanted to like this item and had seen the generally favorable reviews.  I loaded it with some liver treats and opened our front door to offer it to my dog-- she grabbed the rope and released it...and it fell about two feet onto the step and cracked!  I was pretty surprised it took that little to break it.  The crack was on the screw-in bottom so it spread and basically the bottom broke and it was useless...back to Amazon, sorry!  Maybe a rubber guard for the bottom would make this a better product?
Example Output: Negative

Example Input: I love these chips! They always make a great healthy snack when I'm stuck at work with just the vending machine for sustenance.
Example Output:
Positive