 Dennis Black, the founder of Rough Greens, has over 30 years as a naturopathic physician, a Vietnam-era helicopter pilot, and a 40-year survivor of stage 4 kidney cancer. He grew up with dogs on a Missouri farm. Rough Greens is a dog supplement, not food. It's packed with live vitamins, minerals, enzymes, probiotics, and omega oils to help with digestion, bad breath, low energy, achy joints, and more. Just sprinkle a scoop on your dog food.