In this task, 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.

I have fed my dogs Instinct Raw Boost for years. I have two big dogs, one with digestive issues, and then added a third big dog to my pack, so that brand of food was too expensive when I have to buy a 21lb bag every week or so. Dog Food Advisor gave this 5 stars, so I tried it. My problem dog didn't have any problems at all transitioning to this food, and my Great Pyrenees with allergies has had no issues. I am extremely pleased with this food. I would highly recommend it.
positive

This is a very useful tool. The leather protects your hands from getting burned. The second handle is great when I want to hold the dog close to his collar.
positive

The size and fit were promising; unfortunately the sound quality was not great and the left earpiece couldn’t hold a charge longer than 30 minutes, so I am returning them

negative