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Nutrena NatureWise Oyster Shell Poultry Supplement, 7-lb bag

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About This Item

Details

  • Provides a readily absorbed, natural source of calcium for chickens, ducks, turkeys, pheasants, and other poultry.
  • Supports strong eggshells.
  • The added calcium helps reduce weak, soft, or broken shells.
  • Convenient supplement for your birds.
  • Helps replenish calcium lost through egg laying.

Ingredient Information

Feeding Instructions

Frequently bought together

Questions & Answers

1 Customer Questions

Is the size of these oyster shells too big for quail?

Reviews
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4.7
Rated 4.7 out of 5 stars
802 Ratings
Terms & Conditions

171 Customer Reviews

Rated 1 out of 5 stars
Verified Purchase
By Shannon on Jun 4, 2026

Misleading

Product is mostly calcium carbonate. I was expecting oyster shell. I already had a giant bag of calcium carbonate that my chickens will not eat so now I have this

Product is mostly calcium carbonate. I was expecting oyster shell. I already had a giant bag of calcium carbonate that my chickens will not eat so now I have this useless bag of calcium carbonate that was advertised as oyster shell

Rated 1 out of 5 stars
Verified Purchase
By Miatagirl on Oct 3, 2025

Big Rocks

This product is way too big. My 6 hens won't touch it. And even if they did I'm sure it would be very hard on their digestive system it digestive at all. I've got

This product is way too big. My 6 hens won't touch it. And even if they did I'm sure it would be very hard on their digestive system it digestive at all. I've got an old spice grinder that I'll try to grind smaller, if not I'll be throwing it away. Don't waste your money.

Rated 5 out of 5 stars
Verified Purchase
By MARANATHA on Nov 21, 2025

Great

If your hens are laying soft or pimply eggs, stop reading and buy this. Nutrena’s oyster shell is the gold standard for calcium supplementation. It’s clean, perfectly

If your hens are laying soft or pimply eggs, stop reading and buy this. Nutrena’s oyster shell is the gold standard for calcium supplementation. It’s clean, perfectly sized, and practically dust-free.

Rated 5 out of 5 stars
Verified Purchase
By Marilyn on May 21, 2024

Calcium Additive

Chickens should have extra calcium available when they reach laying age (20 weeks). This supplement should not be added to their food, but be available to them

Chickens should have extra calcium available when they reach laying age (20 weeks). This supplement should not be added to their food, but be available to them. They will take a little themselves on a as needed basis. The purpose is to harden the egg shells and replace calcium used when they reach egg producing age.

Rated 5 out of 5 stars
By Stephanie on Nov 10, 2023

Necessity

This supplement is necessary for layers. I have it available at all times in its own dedicated feeder. The hens get it as needed. High quality item. Will buy

This supplement is necessary for layers. I have it available at all times in its own dedicated feeder. The hens get it as needed. High quality item. Will buy again.

Rated 1 out of 5 stars
Verified Purchase
By Tim on Dec 6, 2024

Strong smell of rancid oil

My chickens won't eat it. It has a very strong smell of rancid oil. I feed the chickens with "wet" feed (cooked corn kernels). I mix the food with powdered calcium

My chickens won't eat it. It has a very strong smell of rancid oil. I feed the chickens with "wet" feed (cooked corn kernels). I mix the food with powdered calcium (I grind calcium pills into powder with a coffee bean grinder). Usually them fight for it and finish it in no time. I then grind some of this oyser shell and mix with the (wet) food. The chickens eat a little bit of it and then leave it alone. Apparently the smell of the rancid oil puts them off.

Rated 5 out of 5 stars
Verified Purchase
By Lisa on Jun 1, 2026

I sell eggs

I sell eggs at farmers markets. Even though the girls free range 2 acres I started getting a bunch of broke eggs. Since I started giving them this I’ve only gotten

I sell eggs at farmers markets. Even though the girls free range 2 acres I started getting a bunch of broke eggs. Since I started giving them this I’ve only gotten a couple of broken eggs out of about 5 dz a day. I’m feeding it to my 40 duck hens as well for the same reason.

Rated 1 out of 5 stars
Verified Purchase
By Emma on Sep 12, 2025

Too big for chickens

Chunks are too big for chickens, and that's whats pictured on the bag. My chickens want nothing to do with them, at first they tried to break them, but too hard

Chunks are too big for chickens, and that's whats pictured on the bag. My chickens want nothing to do with them, at first they tried to break them, but too hard. I was expecting something like the grit size. These would be for geese or maybe turkeys. NO, I do not recommend for chickens.

Rated 5 out of 5 stars
Verified Purchase
By samantha on Aug 26, 2024

My chickens don’t have soft shells, but I provide this for them in a small dish as free choice while the free range in my yard. They peck at it here and there. I

My chickens don’t have soft shells, but I provide this for them in a small dish as free choice while the free range in my yard. They peck at it here and there. I cannot speak on if it helps with soft shells or not though, as I purchased it for them as more of a preventative thing. This bag is lasting a long time for me as well, as it is free choice.

Rated 2 out of 5 stars
Verified Purchase
By Robin on Jul 24, 2025

It Too Big

My chickens won’t touch it and I’m certain it’s because it’s so big. I’m saving it for when they get fully grown but even my laying hens eat everything but it,

My chickens won’t touch it and I’m certain it’s because it’s so big. I’m saving it for when they get fully grown but even my laying hens eat everything but it, so I don’t know