Dogs are smarter than we think – that’s why Nina Ottosson games and puzzles are perfect to challenge your dog's mind and senses. While humans use vision to navigate the world, dogs use their keen sense of smell to gather information, problem solve, and forage for food. By providing your dog with daily puzzles and games, you are enriching their life in ways that other toys and activities can’t. Nina Ottoson by Outward Hound puzzle games for dogs comes in four different levels and are suitable for all sizes of puppies and dogs. This is Nina Ottosson's philosophy: "Dogs and cats have four legs and one head. All five need exercise daily, both physically and mentally. Some require more than others, but everyone needs it."