The cuttlefish shell is a must-have in any bird house. It is a vital source of calcium and minerals and naturally strengthens bones, beak and eggshells. On top of that, it is a fun activity for any type of bird. Fitted with handy hanging clip. Natural source of calcium and minerals Strengthens bones, beak and eggshell A must-have for any bird shelter (for any type of bird) With handy hanging clip Fun activity, counteracts boredom