The coffee wood chews are perfectly safe. The soft and tiny fibers that come from the wood can be swallowed and digested without any harm to your dog. It promotes mechanical cleaning of the teeth and strengthens the jaw muscles. Chewing coffee wood loosens tiny fibers that have an additional cleaning and dental floss effect on the teeth. Through abrasive chews’ natural chewing process, your dogs will have natural dental care with every bite and no worries about gum disease or plaque.