Derived from natural cuttlefish. Suitable for birds, hamsters and turtles. We respect and cherish each customer, if you have any questions whether before or after ordering, please feel free to contact us, we make every reasonable effort to supply service that satisfy your requirements. Package Including 1If you have any problems about our product.Please feel free to contact us directly any time and we’ll reply to you within 24 hours. We respect and cherish each customer, if you have any questions whether before or after ordering, please feel free to contact us, we make every reasonable effort to supply service that satisfy your requirements. Suitable for cockatiels. Please be reminded that due to lighting effects, monitor’s brightness / contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item. Provides natural calcium and minerals.