Bob-A-Lot Multi Chambered Interactive Dog Toy by Starmark can be filled with treats or food in the top or bottom chamber, and must be manipulated by the dog’s nose or paws to extract the goodies inside. Both the top and bottom chambers feature adjustable openings to regulate the difficulty in which the dog removes the treats. The toy holds up to three cups of food in a variety of sizes, and is a great way to feed and exercise your dog. The Bob-A-Lot is made from a durable polymer with an anti-slip coating on the bottom. One size is appropriate for dogs of all sizes, however there is now a new Small Bob-A-Lot if you choose. TREAT Dispensing Bob-A-Lot Holds Variety of Treats & Kibble Easy-to-Fill, Easy to Clean dual chambers allow you to fill Treats with kibble. Easily Customize Difficulty Level Adjust opening to control release of treats. Bobs and tilts on weighted, anti-slip base. Provides Hours of Challenging Play Puzzle releases treats as your dog paws, nudges and chases. Bob-A-Lot Directions: Pour kibble and/or treats in top. Adjust the 2 openings for difficulty level. Treats fall out as your dog plays! Bob-A-Lot works well when filled with Simply Wild Pet Food. The small is ideal for dogs under 30 lbs and measures 7″ tall and 15″ around the largest point. The large is ideal for dogs over 30 lbs and measures 10″ tall and measures 19″ around the largest point. STARMARK TRAINING & BEHAVIOR SOLUTIONS As the world leader in pet educations for over a decade, our award-winning training and behavior tools are developed by experts and performance-tested by thousands of dogs at the Starmark Academy – Animal Behavior Center. As the facility of world-class education and training programs for dogs and professional dog trainers, we understand how dogs think, play and learn – this hands-on knowledge makes our products unique. Our entire system of safe, effective and useful solutions is designed to stimulate the mind and body. Our goal is simple: keeping pets happy in their homes by improving relationships with their owners.