Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great exercise ball for destructive dogs

This ball is about to give my 80 lb aussie a heart attack. He gets so frustrated trying to get his mouth on it and chases it around the yard. He is quite vocal about it. Also bought the 8" Jolly Pets Bounce-n-Play and the 10" Best Ball. Our smaller 45 lb aussie likes the 8" ball. All equally indestructible so far. A litte pricey for dog toys. But most toys for my dogs last only days if not minutes. Highly recommended for those truly tough chewers. These are hard balls and meant for outside play and depending on how agressive your pet is, may destroy small shrubs.