This set consists of Onix pawzles only and is an excellent addition to increase number of possible combinations on your base. Onix is a pawzle that takes up 2 spots on the base and requires sliding the lid open. It has a hole on the lid so your dog can smell the treat hiding underneath. The lid can be pushed with a dog's nose, tongue, or paw.

You can fill in the compartments with treats, regular dog food, or even peanut butter for your dog to find.