ike us, birds require a good supply of calcium in their diet to help them grow strong and healthy. Calcium is essential for the formation of bone and eggshell, as well as helping to control many important functions in the body including the nervous system. A lack of calcium may cause rickets, bone deformities, convulsions, and weakness of paralysis. Seed only diets are usually deficient in calcium, so the addition of Bird Munchies Cuttlefish Bone provides an excellent natural source of calcium while giving your pet bird an extra activity. A safe and simple holder is also included in this pack for your convenience.