Your bird, especially an egg-laying hen, needs calcium. Cuttlebone provides a natural, inexpensive source of calcium carbonate as well as other trace minerals and irons. All birds need calcium, and cuttlebone is as good a source as any. Cuttlebone is essentially good for your Birds(hens,parrots,canaries etc), Snails, Shrimps, Reptiles (eg. tortoise,turtles) and others. -Cuttlebone Piece Calcium Supplement (6pcs) -Because of the natural state of this item, the size, shape, color and general appearance will vary from piece to piece. -Contact us also for industrial use of Cuttlebone -large quantities