calcium and VD3 Specifically formulated for pigeon use: The most economical high specification avian calcium supplement.Essential for when calcium deficiency may be suspected or during breeding. Maintains correct calcium levels. Usage&Dosage : Young pigeon: hang ring after the end of the plume: 1 - 2 per day, for the feather fast, energetic. Pigeon: paired before two weeks: 2 capsules per day, Promote pigeon milk, Avoid soft shell eggs, Laying is large and smooth. Pigeon: 2 capsules per day, improve the ability to fly, enhance physical fitness, endurance