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Manna Pro Crushed Oyster Shell Calcium is a natural supplement designed to support strong eggshell formation, bone health, and overall growth in young laying hens and growing poultry. Heat-treated for purity, this pullet-size feed helps prevent weak or broken shells and maintains proper skeletal development for your flock.
Manna Pro Crushed Oyster Shell Calcium is an all-natural supplement designed to support strong eggshell formation, bone health, and overall wellbeing for your flock. This 6-pack of 5 lb bags provides a dependable, heat-treated source of calcium to help prevent weak or soft eggshells in young laying hens, pullets, and growing poultry.
Pros:
Cons:
This product is ideal for backyard chicken owners, homesteaders, and poultry farmers looking for a reliable, natural crushed oyster shell calcium supplement to support laying hens, pullets, and ducks in maintaining strong eggshells and optimal bone health.
Yes, this crushed oyster shell calcium is crushed to pullet size for easy consumption, providing essential calcium for growth and proper skeletal development in young laying hens and pullets.
No, oyster shells provide calcium for eggshells and bone health, while grit aids digestion.
You can provide it in a separate dish for hens to consume as needed, mix it with chicken feed, or scatter it in the coop.









| Weight | 13.608 lbs |
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Out of a total of 336 products:
Sherri Dale –
5.0 out of 5 stars My hens don’t like it My hens were molting and needed more calcium. I am not sure if they like this. It looks like very small white gravel. I put it in a bowl and it doesn’t seem like they are eating it. I have taken to sprinkling it in the chickens run. The hens maybe setting it. I just think it’s not as chewable as they would like. It appears to be of good quality. My hens are just picky. They won’t even eat earthworms.Variation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
NICOLE TEAL –
5.0 out of 5 stars Chickens love it My chickens love it. Makes the eggs strong. Help them digest their food.Variation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
Stacey Mcelrath –
4.0 out of 5 stars Pieces are too large The chicks are to large for consumption and hard to grind downVariation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
WesZ –
5.0 out of 5 stars Oyster Shell for Horticulture Soil Absolutely Amazing! I am not using this for livestock, I am using it for horticulture and plants. This is 100% perfect for Cacti and Succulents soil mixtures. Great drainage, perfect.Variation: Size: 5 Pound (Pack of 6)Style: Oyster Shell
sceneit –
5.0 out of 5 stars Works well for Ethel and Myrtle! I can tell when the hens are using this product! (No I didn’t ask them.) The egg shells are much thicker and they seem a little healthier.Variation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
austin powell –
5.0 out of 5 stars Buy it, good quality Good qualityVariation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
Holly –
5.0 out of 5 stars Very Very Solid Choice Gets the job DONE. It is healthy for my girls, it doesn’t alter their taste, it has great texture, it has zero odor, and is super easy to use. However, if you free range your flock, then you do not need this, as they will find there own calcium sources and most feeds already have it in them.Variation: Size: 5 Pound (Pack of 1)Style: Oyster Shell
Texas Lady –
5.0 out of 5 stars Happy Chickens Chickens peck it.Variation: Size: 5 Pound (Pack of 1)Style: Oyster Shell