---
product_id: 4312710
title: "Crushed Oyster Shell for Chickens – Calcium Supplement for Laying Hens to Support Strong Eggshells – Natural Poultry Mineral Feed for Backyard Chickens – 5 lb Bag"
brand: "manna pro"
price: "315 Lei"
currency: RON
in_stock: true
reviews_count: 11
category: "Manna Pro"
url: https://www.desertcart.ro/products/4312710-crushed-oyster-shell-for-chickens-calcium-supplement-for-laying-hens
store_origin: RO
region: Romania
---

# Premium oyster & coral calcium blend Heat-treated for purity & safety Supports strong, slow-release eggshell calcium Crushed Oyster Shell for Chickens – Calcium Supplement for Laying Hens to Support Strong Eggshells – Natural Poultry Mineral Feed for Backyard Chickens – 5 lb Bag

**Brand:** manna pro
**Price:** 315 Lei
**Availability:** ✅ In Stock

## Summary

> 🥚 Elevate Your Flock’s Egg Game with Pure Calcium Power!

## Quick Answers

- **What is this?** Crushed Oyster Shell for Chickens – Calcium Supplement for Laying Hens to Support Strong Eggshells – Natural Poultry Mineral Feed for Backyard Chickens – 5 lb Bag by manna pro
- **How much does it cost?** 315 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/4312710-crushed-oyster-shell-for-chickens-calcium-supplement-for-laying-hens)

## Best For

- manna pro enthusiasts

## Why This Product

- Trusted manna pro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Safe Nutrition:** Heat-treated oyster shells eliminate contaminants, ensuring your flock’s health is never compromised.
- • **Self-Regulated Feeding Freedom:** Allows hens to control their calcium intake, preventing weak shells and optimizing laying performance.
- • **Made in the USA, Trusted Quality:** Proudly crafted domestically with premium ingredients for consistent, reliable poultry nutrition.
- • **Versatile for All Backyard Flocks:** Perfect for chickens, ducks, quails, and more—supporting strong bones and vibrant egg production.
- • **Calcium Powerhouse for Peak Layers:** Boost eggshell strength with a natural, slow-release calcium source tailored for all laying poultry.

## Overview

Manna Pro Crushed Oyster Shell is a premium, heat-treated calcium supplement made in the USA, designed to support strong eggshell formation and overall health in laying poultry. Its slow-release oyster and coral calcium blend allows hens to self-regulate intake, improving egg quality and skeletal strength without artificial additives.

## Description

Manna Pro Crushed Oyster Shell is a premium calcium supplement formulated specifically for laying hens to support strong, healthy eggshell formation and overall skeletal strength. This natural source of calcium comes from heat-treated oyster shells, which are ground to an optimal size for slow, steady absorption by your poultry. Offering Manna Pro Crushed Oyster Shell self-fed allows hens to self-regulate their calcium intake based on individual needs, reducing the risk of soft or thin-shelled eggs and promoting peak laying performance. This supplement is an essential addition to the diet of backyard chickens, especially those on grain or layer feed, as it provides supplemental calcium not always delivered in standard diets. It also helps maintain strong bones and supports long-term health in laying flocks. With no artificial additives or preservatives, Manna Pro’s Crushed Oyster Shell is safe, effective, and trusted by poultry keepers who prioritize nutrition and egg quality. Choose Manna Pro for all your backyard chicken needs.

Review: Great Supplemental calcium - Chickens love this stuff and it serves it's purpose.
Review: Would buy again - Great product and value easy to use for health care digestion appearance was good

## Features

- FOR LAYING POULTRY: Our crushed oyster shells are crafted to provide essential calcium for all laying poultry including chickens, ducks, and quails; from backyard flock to commercial farms, our product is the perfect addition to your chicken feed
- OYSTER SHELL & CORAL CALCIUM: Made from a premium blend of crushed oyster shells and coral calcium, this supplement provides a high-quality, easily digestible source of calcium to support strong eggshells and overall health in laying poultry of all types.
- STRONGER EGGSHELLS WITH NATURAL CALCIUM: Crushed oyster shells provide a rich, slow-release calcium source for backyard hens, aiding proper eggshell formation, improving egg quality, and supporting overall health and laying performance in laying chickens.
- HEAT TREATED FOR PURITY: Our crushed oyster shells are heat-treated for maximum cleanliness, helping eliminate harmful contaminants, bacteria, and pathogens. This process ensures a clean, safe calcium source you can confidently feed to your poultry.
- MADE IN USA: Our chicken food is proudly made in the USA, using only the finest ingredients; by choosing our crushed oyster shells for chickens, you're ensuring your birds receive a high:quality, domestically made product that you can trust

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000MD59TC |
| ASIN  | B000MD59TC |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #1,959 in Pet Supplies ( See Top 100 in Pet Supplies ) #22 in Bird Food |
| Brand Name | Manna Pro |
| Breed Recommendation | All Breed Sizes |
| Color | Coral |
| Customer Reviews | 4.7 4.7 out of 5 stars (15,810) |
| Date First Available | January 2, 2007 |
| Date First Available  | January 2, 2007 |
| Directions | Layers: Feed Manna Pro Oyster Shell to layers free choice in a separate feeder, or add 1 lb. to 20 lbs. of layer feed. Pullets: Feed Manna Pro Oyster Shell to pullets starting at 18 weeks of age and continue feeding through the entire lay period. |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 4 x 8.33 x 11.5 inches |
| Item Package Dimensions L x W x H | 10.85 x 7.95 x 3.64 inches |
| Item Weight | 5 Pounds |
| Item model number | 1000210 |
| Item model number  | 1000210 |
| Manufacturer | TV Non-Branded Items (Pets) |
| Manufacturer  | TV Non-Branded Items (Pets) |
| Manufacturer recommended age  | 1 month and up |
| Model Name | Manna Pro Crushed Oyster Shell Calcium Supplement |
| Number of Items | 1 |
| Product Dimensions  | 4 x 8.33 x 11.5 inches; 5 Pounds |
| Size | 5 Pound (Pack of 1) |
| Specific Uses for Product | Outdoor |
| Style | Oyster Shell |
| Target Audience Keyword | Birds, Chickens, Ducks, Geese, Poultry, birds |

## Product Details

- **Age Range (Description):** All Life Stages
- **Brand:** Manna Pro
- **Flavor:** Egg
- **Item Form:** Pellet
- **Specific Uses For Product:** Outdoor

## Images

![Crushed Oyster Shell for Chickens – Calcium Supplement for Laying Hens to Support Strong Eggshells – Natural Poultry Mineral Feed for Backyard Chickens – 5 lb Bag - Image 1](https://m.media-amazon.com/images/I/613RXZ-jRtL.jpg)

## Questions & Answers

**Q: I have 2 adult hens, how much should they be given per day or week?**
A: Put a bowl or dish with it out for them. Hens are very in tune with their body and know when they need calcium. Refill as often as needed.

**Q: Is this too large for vermi-composting.  Will worms eat it?**
A: If worms eat oyster shell and calcium they would eat this, it's good quality rock.

**Q: Hi can i feed baby chiks?**
A: You don't want to feed this to baby chicks. Only when they start laying eggs. Only feed medicated chick feed. You can add chick and grit later when there are about 8 weeks old. But do not mix the grit in with their feed. The oyster shell is to help with the calcium needed to create eggs. So do not give that until they are laying.

**Q: Where is this from USA ?**
A: I can’t find anywhere on the package a country of origin. MannaPro is from St. Lewis, but the bag says manufactured for MannaPro.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Supplemental calcium
*by C***S on January 7, 2026*

Chickens love this stuff and it serves it's purpose.

### ⭐⭐⭐⭐⭐ Would buy again
*by K***N on December 10, 2025*

Great product and value easy to use for health care digestion appearance was good

### ⭐⭐⭐⭐⭐ Chicken stuff
*by M***M on January 25, 2026*

Good product

## Frequently Bought Together

- 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
- Manna Pro Chicken Grit with Probiotics – Crushed Granite Grit for Backyard Chickens, Supports Healthy Digestion and Gizzard Function, Ideal for Laying Hens and Small Flocks, 5 lb Bag
- Chicken Oyster Shell Feeder and Grit Feeder Combo

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-18*