Our dog toys has a built-in squeaking sound, which will make interesting sounds during the chewing process, and arouse the dog's interest in playing, release dog's extra energy, reducing destructive behavior.L: We pay special attention to the health and safety of dogs. Our dog chew toys are made of non-toxic natural rubber. It is soft and tough, very chewy, and it can stand the test of the aggressive chewer. And it adding beef flavor, which can greatly excite your dog and extend the playing time.