Mineral Grit for all small & medium birds including the Canaries, Finches, and Parakeets, is a great source of calcium and minerals. Mineral Grit is made with crushed oyster shells and not gravel. The oyster shell is enriched with essential minerals that give its unique color and natural anise oil for a unique, licorice aroma. Birds with digestive problems may benefit from the addition of small amounts of soluble grit to their diet. If you suspect your bird has a digestive problem, consult your Avian vet regarding your bird’s need for a mineral grit.