Groovy Freeze N Chew Dog Toys have been designed with a fundamental understanding of your pets biological behavior, preying instincts and their unique physical capabilities and needs. These toys stimulate and reward positive mental and physical activity through real sounds, tactile feel, aroma, movement and treat rewards. Keeping your dog active will help reduce boredom and destructive behavior. Similar to a Kong these toys are stuffable and freezeable, but with one big advantage, there is only 1 hole! No more leaking messes just pure enjoyment for your dog! Great for cats too!