Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best Cat Food Ever

My son urged us to buy this, after extensive research. We have a 17-year old cat who, while he remains healthy and active, is very skinny. After adding a mix of dry food and Felidae, his coat has become absolutely beautiful and he has added weight to,the point where his spine is no longer exposed. Wahoo, maybe Blackie will live forever!