Nutribles Cuttlefish Bone Mineral Block For All Birds, Crafted With Natural Cuttlefish Bone Consists Of High-Grade Calcium Carbonate. It Is Commonly Known As Calcium Block And Is A Supplementary Nutrition That Must Be Offered To All Birds In Addition To Their Daily Meals. Cuttlefish Bone Mineral Block Plays An Essential Role In The Overall Growth Of Birds. It May Help Develop Strong Bones And Eggshells During Your Bird'S Breeding Phase. There Are Other Trace Minerals In Cuttlefish Bone Like Magnesium, Zinc, And Iron That May Help To Maintain The Overall Nutritional Balance That A Bird May Need. Additionally, Nutribles Cuttlefish Bone Mineral Block May Also Gratify Your Pet Birdie'S Grooming Instincts As They Peck On The Coarse Block To Keep Their Beaks Filed And Strong. These Mineral Blocks Are Vet Verified And Absolutely Safe For Your Bird Consumption Since It Is Free Of Contaminants, Chemicals, Bleach, Toxins, Or Artificial Colors. You May Hang It Outdoors For The Free-Flying Birds Too. Just In Case Your Birds Forget To Peck On Their Mineral Block, You May Scrape Some On Fruits Or Vegetable Meals.