HEALTH & DIGESTION dog treats are natural, ethical, low-calorie, gluten-free, hand-baked mini-bones that dogs love. They include chicken, parsley, charcoal and chicory. Parsley has been used since the 4th century BC to aid digestion, especially in cases of bloating and flatulence. Charcoal was originally used in ancient Egypt, it works by absorbing foods that haven’t been properly digested, which can cause gas. Chicory is a natural prebiotic, which can help to regulate digestive bacteria.