All natural ground elk antler is a nutritional supplement for dogs. It is a great source of Glucosamine, Chondroitin and the following 9 essential elements: Calcium, Copper, Iron, Magnesium, Manganese, Phosphorous, Potassium, Sodium, Zinc. Glucosamine is a safe and natural way to help improve your dog's joint function and quality of life. It has an anti-inflammatory effect, which helps to reduce pain. 1 serving=1/2 teaspoon per 25 lbs 3.9 calories per serving Produced by CST Antlers in Walworth, WI.