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 an otherwise healthy and active 1 year old Rottweiler.  I switched her from Blue Buffalo to Canidae, as it came highly recommended by the holistic pet store I frequent (they are going to be the next to get an earful from me!!!).  Shortly after, I noticed her stool became loose, which is common when you change a dog's diet (I mixed the new food with the old for a week, gradually increasing the amount of the new).  I figured it would get better after a few days.  In fact, it became increasingly worse to the point where spots of blood where showing up in her stool.  I took her to the vet thinking at this point she must have picked up a parasite.  The test came back negative.  My vet thought it must have been something she ate and recommended I feed her chicken and rice for a week to even her out.  I did this and the problem was solved.  After a week I put her back on her regular food- Canidae- and the problem she was having before began to return, albeit gradually.  We have now started to see spots of blood again.  This convinced me it was not just "something she picked up," but the dog food itself.  Now I have learned there is actually a CLASS ACTION SUIT against this dog food maker for the exact problem I described- in some cases people's dogs even died.  I will NEVER purchase this brand again and am switching my dog immediately back to Blue Buffalo- this time no mixing!!
Example Output: Negative

Example Input: Like "Kitten Kisser", I must warn others to do the math and not order this item from Amazon.  Today I received the email notice that my Subscribe and Save order had been shipped and that the charge for this item was $16.10.  Since that is $0.67 per can (and I can get it locally for $0.40 per can), I wondered why I would have signed up for Subscribe and Save at that price.  I checked my account and discovered that my original (on February 3rd) Subscribe and Save order had cost $8.49; a good deal at $0.35 per can and no sales tax.  The Amazon price has now almost doubled.  Now I've learned to check the prices of my Subscribe & "Save" items more often and cancel when necessary.  Regular checking is essential because Amazon doesn't include the current Amazon price of the order in the "Order Shipping Soon" email.  Most incredibly,  the "regular" Amazon price has ballooned to about $0.79 per can, which is almost TWICE the price of the same item at my local pet store.  No, this is not a good deal.
Example Output: Negative

Example Input: My 8 year old Maltese loved these treats.  I didn't know about the FDA warnings until after he died from a "mystery" illness that started out as vomiting followed by lethargy.  He had been very healthy before.  The vet did a necropsy and said my dog's liver was severely enlarged and his kidneys were also affected.  Please don't feed your beloved pets ANYTHING made in China.  If I had known about the dangers, I would never have given these to my dog.
Example Output:
Negative