Pet-Tabs® is a comprehensive nutritional supplement comprised of vitamins and minerals made especially for dogs. Ensure your dog is not missing anything nutritionally with this complete supplement. This supplement includes Calcium, Phosphorus, Potassium, Chloride, Magnesium, Iron, Copper, Manganese, Zinc as well as Vitamin A, D, E, B12, Pyridoxine, Niacin, Riboflavin, and Thiamine.