Best Gift for Dogs】Interactive dog chew toys helps to satisfy dogs' instinctual needs and release extra energy, solve problems such as chewing, teeth cleaning, anxiety, boredom, training, and barking. control and reduce destructive behavior.In this way, your dog can keep mental and physical health and learn appropriate behavior. Durable and Healthy】Use environmentally friendly materials,food grade,non toxic,for pet's chewing, playing and training for hours, the uneven shape helps massage and clean the dog’s teeth. The larger dogs have also made good attempts at trying to “eat” the plastic shell. They have made dents & scratches on both shells & the plastic bumps, which I assume are the Dinosaur spikes, have also been eaten & are gone. Sturdy and Not Easy to Damage】Tough & strong enough for aggresive chewers. Tested by German Shepherd, Pitbull, Rottweiler, Stafford Shire, Alaska, Golden Retriever, Labrador, American Foxhound, etc. It's very close to indestructible.