 Rough Greens is helping thousands of dogs feel better and live longer, including my dog who loves it. Naturopathic Dr. Dennis Black, who created Rough Greens, is also an airborne ranger in Green Beret, an amazing background. He loves dogs and is on a mission to help as many as he possibly can. Dog food is dead food. Rough Greens supplements your dog's food with essential vitamins and minerals, omega oils, digestive enzymes, probiotics, and antioxidants.