A Nutritional Guide to Dog‑Friendly Herbs & Supergreens Herbs and supergreens can be a gentle way to add plant compounds, antioxidants, and dietary variety to your dog’s meals. When used in small amounts, they contribute naturally occurring vitamins, minerals, and phytonutrients that complement a whole‑food diet. 🌾 Barley Grass Barley grass is naturally rich in chlorophyll , vitamin E , beta‑carotene , and plant antioxidants . Nutritional Characteristics Contains antioxidant