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.

Ex 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).

Ex Output:
Positive

Ex Input:
I didn't like the taste of this product - couldn't finish it off because it was a little metallic tasting and had an aftertaste.

Ex Output:
Negative

Ex Input:
Carbquik is an amazing product. I use it for all kinds of bread like things on my low carb diet. breadsticks are delicious, the pizza crust is awesome. my only gripe with this is that its TWICE the price on Amazon. Netrition.com offers it for nearly half the price.

Ex Output:
Negative