This is a natural supplement that contains a high ratio of calcium and phosphorus to strengthen and improve the quality of egg shells. Added to your hens’ feed daily, it will help to ensure that they lay the finest eggs in town! Ideal for ex-battery hens. Analysis: Total Phosphorus (P) 18.2% Calcium (CA) 24.5% Oil: trace Protein 0% Fibre 0.1% Ash 82% Doseage: Sprinkle a small amount onto the food. 10 ml measure included, 1 level measure = 10 grams. Poultry : approx ½ measure per bird per day.