Gnaw Guard Foam Ring Spunky Pup's Gnaw Guard Toys Foam Ring Chew Toys. Your dog will love the Gnaw Guard Large Ring. Spunky Pup's Gnaw Guard toys are light yet hard-wearing dental chew toys. Play at home, at the park, or take them to the pool or beach and watch them float! Available in multiple shapes and sizes, Gnaw Guard's highly chew-resistant proprietary design is made from high-quality TPR foam.