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: Besides being smaller than runts, they look the same and have the same consistency.  Unfortunately, they taste nothing like banana runts...nor do they even taste good.  Yucky stuff.  Trying to return with vendor.
Example Output: Negative

Example Input: I have a Pit Bull who is a little over a year old. To say he is food motivated is an understatement. However, with that being said he is still picky. He adores these treats and others from Darford. I do much research before I feed treats/food to my dog and I could not find any bad information on this company. I promote these treats to family/friends that have dogs and their dogs are also hooked. Good wholesome treats.
Example Output: Positive

Example Input: I have used this dog food for years.  About a year ago they reduced the size of the bag and increased the price.  I continued to buy it.  No one told me there was any change in formula.  My elderly dog started getting hot spots and vomiting yellow stuff. I thought it was just an upset tummy. The vet treated her with antacids and cortizone creams. My poor dog has been through a lousy time.  She was drinking massive amounts of water. I had her kindeys and blood sugar checked.  She was ok there.  Last month, I changed her to California Naturals because it costs less and I can get it at a cheaper store. She has stopped vomiting and doesn't drink as much water.  I didn't even think about it, until I was reading the reviews online and saw the same symptoms in other people's dogs.  I will not go back to Canadae.  Keep away from this crappy dog food.  If your dog is the least bit sensitive, it will create toxic effects for your dog. It is poisonious to those dogs with allergies.
Example Output:
Negative