Dogs will love these for fun, chew and play! Made from 100% untreated, natural tree root. A natural chew toy and toothbrush rolled in one. from an Eco- sustainable source, Roots are hand harvested in protected areas to ensure there is no damage to the forest. Only the tuber is harvested which then sprouts again. Harvesting is limited to a responsible number number each year keeping the ecological impact to a minimum.