Harvested by hand, our Tuber Chews are 100% natural, untreated tree roots from a secret eco-sustainable source. A limited release each year ensures that supplies of the roots are well managed and that supplies are maintained. Tuber Chews are durable and safe and will not splinter, no matter how hard your dog tries to chew them. And when they do chew, your dog will release the vitamins and minerals that are naturally present within the roots. Tuber Chews act like a fun, natural toothbrush, caring for your dog while they play.