Instructions: 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.
Input: My cat had a severe allergic reaction from this food resulting in deep, crusty, oozing, lesions on his face around his mouth, up to his ears, and down to his neck. On close examination of the ingredients, one unusual additive is sunflower seed oil in this and other Fussie Cat flavors. He's back on his old food and healing nicely. I'll stick with the less expensive brands and save on vet bills from now on.
Output:
Negative