BIOGRIT Granivorous birds' mineral feed (which helps with digestion and intestinal regulation) a combination of plant carbon to control intestinal fermentation and digestible mineral materials (ground shells) to supply calcium and aggregate (quartz and kaolin clay) to aid the bird in breaking down its food. Make-up Marine calcareous shells 43% quartz and 43% granules of fired clay 12.5% of it is charcoal. 1.5% Ash's insoluble analytical content in HCl 55% calcium 20% phosphorous 0,002% sodium 0,01%