 You know, it just hit me. A lot of people think that Rough Greens is dog food. Not at all. Rough Greens is a dog supplement. Greetings. I'm naturopathy doctor Dennis Black, founder of Rough Greens. And you may already know this, but dog food is dead food. And Rough Greens is what our furry family members desperately want and need nutritionally to rebuild their immune system so they can feel better and live longer.