How to supplement calcium to your flock





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The shell of each egg that your hens are laying is made up of nearly 95% calcium carbonate by dry weight. To produce hard eggs, your chicken will be consuming up 20 times the amount of calcium in one year than the amount of calcium that is contained in her actual bones. As their keeper, it is your responsibility to make sure each chicken is consuming a steady supply of calcium in her diet.

DON’T Feed Egg Shells
There are some chicken owners who swear by reusing eggshells and feeding them back to their flock. Some people may crush these before feeding. Feeding your chickens their eggshells may seem like a convenient way to recycle them, but there are several health risks that will be brought upon them.

DO Feed Them Oyster Shells or Limestone
Though this may seem like a higher investment up front, feeding your laying chickens oyster shells or limestone instead of their own eggshells with pay off in the end. By cutting out serious health risks to your chickens and to those eating the eggs they produce, feeding oyster shells or limestone is a cost effective and safe alternative. In addition, a little bit of these products go a long way – a 50 lb. bag of oyster shell or limestone will last the average flock an extended period of time – up to several months for a flock of 6 – 8 birds. Feeding these products is easy - simply put the oyster shell or limestone in a separate container and allow birds access free choice. Your girls will take what they need.

Just keep in mind that when it comes to calcium supplementation for your flock,  ground limestone or oyster shells are safer options than feeding eggshells back to your girls.


Please be introduced that we are No.18 Son Ha Minerals Company Limited, a leading manufacturer and supplier on limestone for making chicken feed in Vietnam.


Our main products is limestone 2-3mm and limestone 250mesh. We are supplying the products for many feed mills both domestic and oversea market.

Our quality product:

·         Whiteness: 90%

·         Brightness: 85%

·         Calcium content: 38%

·         Fe2O3 content <0.05%

·         MgO content <0.2% 

Please reference some of images about our product that we are exporting for our customer as below:



If you interested in our product, please feel free contact with us.

No.18 Son Ha Minerals Co.,Ltd

Address: Mam Xoi Mountain, Thanh Son Commune, Kim Bang District, Ha Nam Province, VN

Telephone: +84 932 222 698

Fax: +84243.5190937

Hotline: +84 932 222 698 (Ms. Anna) // +84 931 717 698 (Mr. Henry)

Email: (Ms. Anna) // (Mr. Henry)

Skype: export1.shcgroup





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