Outward Hound’s Nina Ottosson line has long set the standard for canine puzzle design. The MultiPuzzle Level 4 is the brand’s current expert-tier challenge, built for dogs who have already solved every slider and compartment on Level 3. It measures 15 inches square and stands 1.7 inches tall, so it takes up some floor space but stays low enough that most dogs can work it from a comfortable standing position.

The puzzle uses a mix of sliding blocks, rotating discs, and hidden compartments that require multiple steps to access the treats. Your dog has to nudge a block sideways, then rotate a top layer, then paw at a cover to finally reach the reward. That layered sequence is what separates this from simpler puzzles. It taps into natural foraging instincts but demands real problem-solving, not just brute force. The plastic construction is sturdy enough to withstand determined noses and claws, though you’ll want to supervise during the first few sessions to ensure no pieces get pried loose.

One honest note: this is a true Level 4 puzzle. If your dog is new to treat toys, start with a Level 1 or 2. The MultiPuzzle works best for dogs who already understand the concept of sliding and lifting to find food. It also requires some initial demonstration from you to show how each piece moves. Once they figure it out, though, it provides solid mental exercise that leaves them genuinely tired.