Trixie - Cuttle Fish Bone
Cuttlefish bone serves as a source of calcium, which is lacking in seed. It also provides your bird with a hard surface to gnaw on, which should help to prevent his bill from becoming overgrown.
While cock birds may not consume large amounts of cuttlefish, some hens rip these bones apart.
Hen birds are most likely to consume cuttlefish bone when they are about to start laying, as they will require calcium for the eggshells at this stage.