Calcium supplementation for dogs If they are puppies, it is best to drink breast milk to supplement calcium. If breast milk is not enough, you can feed goat milk powder. Adult dogs can feed calcium tablets or liquids containing calcium lactate, calcium bone powder, glycosaminoglycosaminochondroitin and other ingredients. Calcium supplements can be used to supplement the dog's calcium. In addition, you can take the dog out to exercise more and get more sunshine to help the dog's body absorb calcium.