Spirulina is one of the most nutritious, concentrated foods known. It contains antioxidants, phytonutrients, probiotics, and nutraceuticals! Spirulina provides: Increased Energy & Vitality Reduced Stress Improved Mental Alertness Concentrated Nutrients Powerful Antioxidants Healthy Immune System Detoxification Feeding Recommendations: Small Dogs & Cats: 1/4 tsp Medium Dogs: 1/2 tsp Large Dogs: 1-2 tsp Can be fed separately or mixed with other foods.