Chews offer two valuable benefits to your dog.
Infections, kidney and heart disease can result when poor dental health gives bacteria an environment to enter your dog's body. Bacteria in the dog's mouth breaks down food particles and converts them to plaque and excess acid. The plaque can become mineralized to form a hard deposit on the tooth surface called "calculus." The excess acid damages the gums resulting in gingivitis. Unchecked gingivitis results in periodontitis, the leading cause of tooth loss.
All dogs have an inherent desire to chew, especially puppies. Aberrant chewing can be a sign of lack of exercise or a vitamin deficiency, but it is most often a normal desire to chew. This drive can exhibit itself on furniture and clothing items.