Manna Pro Oyster Shell Poultry Supplement, 5-lb bag

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About This Item

Details

  • Tasty chicken feed to add to your regular feed mix.
  • Heat-treated for purity and safety.
  • Developed to help build strong eggshells.
  • Formulated to be a good source of calcium.
  • Crafted using oyster shells that are crushed into a convenient pellet size.

Ingredient Information

Feeding Instructions

Learn More About Manna Pro From Our Team of Experts

Poultry Feeds, Supplements & Treats

Manna Pro feeds, supplements, and treats help support your flocks at every stage of life with wholesome nutrition. Formulated with essential nutrients needed for healthy growth and vitality, they support optimal health—from hatching to adulthood.

Happier, Healthier Flocks

Manna Pro helps support pet and homestead parents by providing trusted, quality products. Their nutritionally balanced feeds help promote healthier, happier lives for all your feathered companions.

Products That Nurture Life

Packed with real, wholesome ingredients you can see—including whole insects, nutrient-rich grains, and vibrant non-GMO purple corn—Manna Pro products support natural foraging instincts for a delicious and enriching feeding experience.

Crafted for Backyard Poultry

Proper nutrition is key to raising healthy chickens. Manna Pro feeds are packed with protein, vitamins, and minerals to support your flock's growth and keep your backyard beauties thriving.

About Manna Pro

Since 1985—and with roots dating back to 1842—Manna Pro is committed to nurturing life. They make high-quality, nutritionally wholesome feeds, supplements, and treats to help your animals truly thrive.

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Reviews
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4.8
Rated 4.8 out of 5 stars
65 Ratings
Terms & Conditions

30 Customer Reviews

Rated 5 out of 5 stars
By Renee on Jan 17, 2026

Good Product but so pricey for this 5lb quantity

This is a good product but it also comes in a 50lb bag for a few dollars more than this 5lb bag, if only you would have that 50lb bag!

This is a good product but it also comes in a 50lb bag for a few dollars more than this 5lb bag, if only you would have that 50lb bag!

Rated 5 out of 5 stars
By Marianne on Nov 29, 2025

Good quality

Chickens love it. I set it outside in a brick so if it rains the water flows right through

Chickens love it. I set it outside in a brick so if it rains the water flows right through

Rated 5 out of 5 stars
By Suzanne on Dec 15, 2025

Good quality

Hens like it and better than other brands

Hens like it and better than other brands

Rated 3 out of 5 stars
By Patricia on Oct 30, 2025

Pieces are too large

Oyster shell pieces are too large. Have to grind it up more

Oyster shell pieces are too large. Have to grind it up more

Rated 5 out of 5 stars
By Brittany on Mar 6, 2025
Received Free Product

Great Oyster Shells, Healthy & Chickens Love Them

We are super happy with this product - both us and our chicken friends! Great quality for our hens that are laying; we do not consume their eggs but often feed them

We are super happy with this product - both us and our chicken friends! Great quality for our hens that are laying; we do not consume their eggs but often feed them back, but we have had several hens with health issues resulting in laying eggs with soft shells, unfortunately - so far we have not had that issue again, and hope the calcium from the shells will continue to aid their deficiencies. We also have a few hens friends that are quite picky, and I believe having the diverse sizes of the oyster shells has helped all our hens continue to eat them. Would recommend all with laying hens or calcium deficient chickens to have these on hand.

Rated 4 out of 5 stars
By Farm Kat on Apr 1, 2025
Received Free Product

Good support for strong shells

We have been using this during February and March, a time when the hens typically don't spend much time outdoors (although they have full access, it rains a lot

We have been using this during February and March, a time when the hens typically don't spend much time outdoors (although they have full access, it rains a lot here) and thus their food is less diverse. We like to enrich their food in winter, so this was a good addition and we haven't tried this exact product before. We simply mixed some in with their usual layer crumble and also sprinkled a bit on the floor of the coop for them to peck at, along with some ground corn. Their egg shells have remained robust and they don't mind eating it (they eat everything!), so we're giving it two thumbs up.

Rated 5 out of 5 stars
By Erika on Mar 8, 2025
Received Free Product

Great Quality, My Girls Loved It!

My chickens just started laying eggs again a few weeks ago after having the winter off. After re-filling their trough, they began pecking at it right away. I’m always

My chickens just started laying eggs again a few weeks ago after having the winter off. After re-filling their trough, they began pecking at it right away. I’m always amazed they know exactly what they can/should eat. I initially tried this brand last summer because what I was using was rather sharp and not very well liked by my flock. If one dislikes something and won’t eat it, the rest unfortunately follow suit. I’m so happy they actually do like this oyster shell. The pieces look like course pebbles of different sizes and the dust while handling the oyster shells is minimal. My girls’ eggshells are nice and strong. I am very happy with this brand!

Rated 4 out of 5 stars
By Mowgli on Feb 25, 2025
Received Free Product

Girls approve

I love that this product helps to strengthen my chickens eggs. Some of their shells crack so easily! I just got it so haven’t been able to see improvement yet but

I love that this product helps to strengthen my chickens eggs. Some of their shells crack so easily! I just got it so haven’t been able to see improvement yet but I’m hoping it will do the trick. The bag did not seal shut properly so I had to find somewhere to keep it without it spilling out or anyone getting into it. It smells bad but that’s expected with anything for chickens. Otherwise the girls seem to like it.

Rated 4 out of 5 stars
By Zoe on Oct 22, 2025

Large grit

Larger than expected, girls still enjoy it

Larger than expected, girls still enjoy it

Rated 5 out of 5 stars
By SusanW on Feb 28, 2025
Received Free Product

Calcium supplementation is vital!

I've kept chickens for egg production and pets for over 25 years and am ashamed to say it took me a long time to understand the importance of calcium supplementation

I've kept chickens for egg production and pets for over 25 years and am ashamed to say it took me a long time to understand the importance of calcium supplementation. Even though I took great care of them, over time I ended up losing birds to egg production diseases because they were depleted of calcium. Now, at all times I keep a bowl of oyster shells mixed with grit in both my coops. In addition, I further crush the shells and sprinkle the coarse powder on chopped vegetables and fruits. I seriously love my birds, which include standard hens, a Cornish Cross rescued from a slaughterhouse, bantam hens, and a tiny bantam rooster named Mini Roo.