Used by fanciers for years. This is a strong product and directions should be followed with care, do not use more. The recommended dosage is 8-10 drops per gallon and the product is in a dropper bottle to make it easier to administer. One bottle will make many gallons. The suggested use is before and during breeding season. If you find that some of the young start to peck thru the egg but die trying, this is a sign that you may need this product. Usually it is a small hole in the shell. Use is suggested at least once or twice a week.