Molecuball Dog Toys by OurPet's www.petsmart.com - $8.99 Product Description: The interactive nature of the Molecuball can help to reduce boredom and destructive behaviors by keeping your dog occupied with healthy play and exercise. The irregular shape of the ball will cause it to roll unpredictably, which will keep your dog guessing about what's going to happen next. And once the food or treats begin to roll out, there's no telling how long your dog will keep playing! It's made of durable, non-toxic thermoplastic, which won't damage carpets or furniture or leave marks on walls and floors. RattyRat's Review: This is another kind of treat dispensing toy we found and it worked fairly well. The problems we had with this toy is that the opening wasn't adjustable and our rats instead of rolling it around as much, would chew at the opening to make it bigger. Given a choice the Toy Buddies Vinyl Treat Ball is much better.