Pollys Cuttlebone Secrets provide an intriguing treat toy for birds. The cuttlebone secrets are designed with chunks of cuttlebone, 100% digestible ground calcium wafers and Cholla Cactus wood to give your bird fun and flavour. Cuttlebone, the internal shell of a Cuttlefish, contains the highest amount of natural Calcium plus Phosphate, as well as many other important trace materials and is to provide supplemental Calcium for pet birds.