Manna Pro Crushed Oyster Shell for Chickens – Calcium Supplement for Laying Hens to Support Strong Eggshells – Natural Poultry Mineral Feed for Backyard Chickens – 5 lb Bag

Great quality product for egg layers. No smell and hardly any dust in bag from smashed shells. Comes in a zip top sealable bag keeping product safe from contaminants and easy to use. Eggs shells are healthier since starting to use oyster shells.

My hens absolutely love this! Ever since I started offering these premium, heat-treated oyster shells, their eggshells have been noticeably stronger and healthier.

very good price

Chickens loved it. Produced one egg each time.

This would be good for Chickens. However not so good for Quail. The crush size is too large for Quail. I have tried to reduce the crush size by blender, which did not work, and then bagging it and whacking it with a hammer MANY times, which also did not work. Holy cow, oyster shell is strong!

Last a good amount of time. Perfect size to fill my gravity feeder ( cat food dispenser) . No smell, no sharp edges that i can see. My girls like it and seems to work well.

Good product

Only shell my chickens will eat