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 been giving these chews to my Mini-Pincher and Mini-Dauchand for the past 3 years to help support their joints and hips.  The last batch I bought is darker in color to the point of almost being burnt and smells a lot more.  It made my Mini-Pincher sick to the point of vomiting and liquid stools.  I am going to shop for a better product that is made here in the US . . . I have been looking at GNC products for Dogs and that is probably the route I will take.
Example Output: Negative

Example Input: Received product timely.  Upon opening product found weevil infestation. Put product in freezer to kill weevils.  Returning product would have been a nuisance.
Example Output: Negative

Example Input: When I placed my order it was for Hartz Pigskin 10 pack with sweet potato center.  When I received the order it was Hartz Pigskin 10 packs but it was all pigskin and this is not easy for my dog to chew.  I contacted the company and they were very nice about the hole thing as they refunded the money to my credit card and told me to take the pigskin packs to a local shelter or SPCA.  They were also very fast in sending out the original product.  They told me that they forgot to change the photo from sweet potato center to all wrapped pigskin and they would do that.
Example Output:
Negative