---
product_id: 741921610
title: "Oyster Shell for Chickens - Calcium Supplement for Chickens, 100% Natural Limestone Calcium Carbonate, Strong Eggshell & Bone Booster, 4 lbs"
brand: "mile four"
price: "4216280₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Mile Four"
url: https://www.desertcart.vn/products/741921610-oyster-shell-for-chickens-calcium-supplement-for-chickens-100-natural
store_origin: VN
region: Vietnam
---

# Dual-action fine & coarse calcium release Stronger, thicker eggshells 100% natural calcium carbonate Oyster Shell for Chickens - Calcium Supplement for Chickens, 100% Natural Limestone Calcium Carbonate, Strong Eggshell & Bone Booster, 4 lbs

**Brand:** mile four
**Price:** 4216280₫
**Availability:** ✅ In Stock

## Summary

> 🥚 Elevate your flock’s eggshell game with nature’s calcium powerhouse!

## Quick Answers

- **What is this?** Oyster Shell for Chickens - Calcium Supplement for Chickens, 100% Natural Limestone Calcium Carbonate, Strong Eggshell & Bone Booster, 4 lbs by mile four
- **How much does it cost?** 4216280₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/741921610-oyster-shell-for-chickens-calcium-supplement-for-chickens-100-natural)

## Best For

- mile four enthusiasts

## Why This Product

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

## Key Features

- • **Pure & Natural:** 100% untreated limestone oyster shell—no additives, just pure farm-fresh calcium goodness.
- • **24/7 Calcium Power:** Fine particles deliver instant calcium, coarse particles ensure steady overnight release.
- • **Rock-Solid Eggshells:** Boost your hens’ calcium naturally for eggs that won’t crack under pressure.
- • **Healthier Hens, Happier Eggs:** Supports bone strength, immune health, and cardiovascular function for peak laying performance.
- • **Perfectly Portion Controlled:** Chickens self-regulate intake—about 1 lb per hen per month, no waste, no guesswork.

## Overview

Mile Four Oyster Shell is a premium, 100% natural limestone calcium carbonate supplement designed for laying hens 20+ weeks old. Combining fine and coarse particles, it delivers both immediate and sustained calcium release to strengthen eggshells and bones, boost immune and cardiovascular health, and reduce egg breakage. Each 4 lb pack supports multiple hens with self-regulated intake, ensuring healthier, thicker eggshells and happier chickens.

## Description

Oyster Shell is a premium source of calcium for building stronger egg shells. Provide to laying hens around 20+ weeks of age. Oyster Shell is rocks with nothing added.Specifically, 100% natural limestone. Oyster Shell is a blend of fine and coarse untreated calcium carbonate (CaCO) mined from limestone.Fine particles provide an immediate calcium supply while coarse particles provide a slower, steady calcium release. A mix of fine and coarse provides a consistent calcium release into the hen’s bloodstream overnight providing strong eggs and stronger bones. Eggshells are 94-97% calcium carbonate. Oyster shell is an organic, natural way to give chickens the calcium boost needed to produce strong eggshells that will not break.Stronger Eggshells: Get stronger, thicker, healthier eggshells from laying (20+ weeks) chickens by boosting their calcium with oyster shell organic, all-natural calcium booster Happier & Healthier Chickens: Strengthen bones (reduce bone break & damage), bolster blood vessels, boost immune systems, improve cardiovascular function & reduce egg breaking with oyster shell 24/7 Calcium Boost: Coarse limestone provides a consistent calcium release into the laying hens bloodstream overnight & the powder provides an immediate calcium boost - perfect for strong eggshells Laying Chickens Need Calcium: Eggshells are 94-97% calcium carbonate. Oyster shell is an organic, natural way to give chickens the calcium boost needed to produce strong eggshells that will not break

Review: Excellent additional source of calcium for laying hens and they love it. Will have to set up routine shipments.
Review: It a great dietary supplement for your chickens

## Features

- TASTE & SEE THE DIFFERENCE IN YOUR EGGS: Or our humans will make it right
- STRONGER EGGSHELLS: Get stronger, thicker, healthier eggshells from laying (20+ weeks) chickens by boosting their calcium with oyster shell organic, all-natural calcium booster
- LAYING CHICKENS NEED CALCIUM: Eggshells are 94-97% calcium carbonate. Oyster shell is an organic, natural way to give chickens the calcium boost needed to produce strong eggshells that will not break
- HEALTHIER FOR LAYING CHICKENS: Strengthen bones (reduce bone break & damage), bolster blood vessels, boost immune systems, improve cardiovascular function & reduce egg breaking with oyster shell
- 1 CHICKEN = 1 lb. PER MONTH: Laying chickens eat oyster shell as needed (similar to grit) & will not overeat. Quantity varies by breed & weather; 1 lb. each month per laying chicken is average

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SG6ZGFB |
| Best Sellers Rank | #41,482 in Pet Supplies ( See Top 100 in Pet Supplies ) #663 in Bird Food |
| Breed Recommendation | All Breed Sizes |
| Care instructions | Keep in a Dry Place |
| Customer Reviews | 4.5 4.5 out of 5 stars (153) |
| Date First Available | 24 June 2025 |
| Flavor | Natural |
| Item Form | Solid |
| Item Weight | 1.81 Kilograms |
| Manufacturer reference | oyster_shell_4 |
| Material Composition | Stone |
| Number of Items | 1 |
| Pet Life Stage | Adult |
| Pet Type | Bird, Farm Animal |
| Product Dimensions | 17.78 x 10.16 x 25.4 cm; 1.81 kg |
| Quantity | 1 |
| Size | 1.81 kg (Pack of 1) |
| Special Features | Environmentally Friendly, Natural Product |
| Specific Uses | Behavior, Stomach, Teeth, Weight |
| Storage Information | Store in a cool, dry place. |
| batteries required | No |

## Product Details

- **Age range (description):** Adult
- **Brand:** Mile Four
- **Flavour:** Natural
- **Item form:** Solid
- **Specific uses for product:** Behavior, Stomach, Teeth, Weight

## Images

![Oyster Shell for Chickens - Calcium Supplement for Chickens, 100% Natural Limestone Calcium Carbonate, Strong Eggshell & Bone Booster, 4 lbs - Image 1](https://m.media-amazon.com/images/I/81ULiKfAyEL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***C on 10 August 2025*

Excellent additional source of calcium for laying hens and they love it. Will have to set up routine shipments.

### ⭐⭐⭐⭐⭐ Review
*by J***A on 2 March 2026*

It a great dietary supplement for your chickens

### ⭐⭐⭐⭐ Review
*by E***N on 23 June 2022*

Obviously you have no control over what 4lbs is, the amount was less than I imagined. Ordering online is tricky as far as picturing what you are actually recieving. The size of pieces is perfect for our adult chickens. They seem happy with it, I've had to refill their dish just a few days after initially filling it. I'll be looking into a bigger bag for any future purchases because the 4 lb bag won't be lasting long. We have 5 chickens, I think their calcium need is higher at 6 years old. So this bag might last longer for someone with younger chickens. Otherwise I recommend comparing the 50lb bag with other options.

## Frequently Bought Together

- Mile Four Oyster Shell for Chickens - Calcium Supplement for Chickens, 100% Natural Limestone Calcium Carbonate, Strong Eggshell & Bone Booster, 4 lbs
- Mile Four Chicken Grit for Layer & Grower Chickens Age 8-20+ Weeks - 100% Natural Mineral Chicken Grit Quartzite, Poultry Grit, USA Mined, 4 lbs
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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-23*