The Duvoplus Mineral Block Is An Ideal Source Of Calcium, Birds Require Calcium For Developing A Good Skeleton. The Mineral Block Keeps The Beak Beautiful & Sharp And The Nails Short. Moreover, It´S An Excellent Activity For Your Bird(S). The Oyster Grit Facilitates The Digestion Of Grains And Seeds. The Mineral Block Is A Perfect Supplement To The Daily Menu Of Your Bird(S).