Deliciously fun! The Rosewood Naturals Treat Nibble-n-Gnaw Stacker is an interesting edible toy made for small animals like rodent and rabbits. It is a combination of treats, balls and toys made from fresh and natural ingredients and materials. The stacker can be hung inside the cage or anywhere where your little pets can enjoy gnawing at them. Present them with Rosewood Naturals Treat Nibble-n-Gnaw Stacker for a challenging yet rewarding time.