---
product_id: 293647277
title: "- Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag | Strengthens Eggshells & Bones; High-Calcium Supplement for Laying Hens; 100% Natural Limestone; USA Sourced; Non-GMO"
brand: "mile four"
price: "€ 98.84"
currency: EUR
in_stock: true
category: "Mile Four"
url: https://www.desertcart.gr/products/293647277-mile-four-oyster-shell-for-egg-laying-hens-calcium-booster
store_origin: GR
region: Greece
---

# Ideal for hens 20+ weeks, supports bone & egg health 94-97% calcium carbonate for stronger eggshells 100% USA-mined, additive-free natural oyster shell - Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag | Strengthens Eggshells & Bones; High-Calcium Supplement for Laying Hens; 100% Natural Limestone; USA Sourced; Non-GMO

**Brand:** mile four
**Price:** € 98.84
**Availability:** ✅ In Stock

## Summary

> 🥚 Elevate Your Egg Game with Pure, Powerful Calcium!

## Quick Answers

- **What is this?** - Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag | Strengthens Eggshells & Bones; High-Calcium Supplement for Laying Hens; 100% Natural Limestone; USA Sourced; Non-GMO by mile four
- **How much does it cost?** € 98.84 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/293647277-mile-four-oyster-shell-for-egg-laying-hens-calcium-booster)

## 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

- • **Trusted by Thousands:** Join 5,000+ backyard flock owners who rely on Mile Four for healthier hens and premium eggs.
- • **Self-Regulated Feeding:** Free-choice feeding lets your hens naturally control calcium intake—no overfeeding, no waste.
- • **Pure & Proudly American:** 100% natural, non-GMO oyster shell sourced exclusively from USA mines—no fillers, no chemicals.
- • **Optimized for Mature Layers:** Formulated specifically for hens 20+ weeks to sustain peak egg production and skeletal strength.
- • **Stronger, Crack-Resistant Eggs:** Boost eggshell durability with 94-97% pure calcium carbonate—fewer breaks, more confidence.

## Overview

Mile Four Oyster Shell is a 4-pound bag of 100% natural, USA-mined crushed oyster shell designed to replenish calcium in laying hens aged 20 weeks and older. With 94-97% calcium carbonate content, it strengthens eggshells, reduces breakage, and supports bone health. Its free-choice feeding approach allows hens to self-regulate intake, ensuring optimal nutrition without additives or fillers. Trusted by thousands of backyard flock owners, this additive-free supplement promotes consistent, high-quality egg production and long-term flock vitality.

## Description

desertcart.com : Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag | Strengthens Eggshells & Bones; High-Calcium Supplement for Laying Hens; 100% Natural Limestone; USA Sourced; Non-GMO : Pet Supplies

## Features

- STRONGER EGGSHELLS, FEWER BREAKS – Eggshells are 94–97% calcium carbonate; this crushed oyster shell replenishes what laying hens lose daily, reducing cracked and thin-shelled eggs.
- 100% NATURAL & USA MINED – Non-medicated, additive-free crushed oyster shell limestone, mined and sourced entirely in the USA. No fillers, no chemicals, no imported shell.
- FOR CHICKENS 20+ WEEKS – Ideal free-choice calcium supplement for laying hens and ducks once they begin producing eggs; supports bone strength and long-term flock health.
- FREE-CHOICE FEEDING MADE EASY – Serve in a separate dish near the feeder (never mixed into feed) so each bird self-regulates intake; birds naturally eat what they need without overeating.
- TRUSTED BY 5000+ BACKYARD FLOCK OWNERS

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SG6ZGFB |
| ASIN  | B07SG6ZGFB |
| Additional Features | Natural Product Environmentally Friendly, organic |
| Age Range Description | All Life Stages |
| Animal Food Diet Type | Raw |
| Animal Food Ingredient Claim | Additive-Free |
| Best Sellers Rank | #15,024 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #11 in Poultry Feed |
| Brand Name | Mile Four |
| Breed Recommendation | All Breed Sizes |
| Container Type | Bag |
| Customer Reviews | 4.5 4.5 out of 5 stars (223) |
| Date First Available  | May 25, 2022 |
| Flavor | Unflavored |
| Global Trade Identification Number | 00737488079470 |
| Item Form | Granule |
| Item Weight | 4 pounds |
| Manufacturer | Mile Four |
| Manufacturer  | Mile Four |
| Manufacturer Part Number | oyster_shell_4 |
| Number of Items | 1 |
| Occasion | Birthday |
| Package Size Name | 4 Pound |
| Pet Type | Bird |
| Product Benefits | Free-choice, self-regulating feeding, Natural, minimally processed ingredient, Stronger, more durable eggshells, Supports consistent, higher-quality egg production over time, Supports overall bone and skeletal health |
| Product Dimensions  | 7 x 3.5 x 10 inches; 4 pounds |
| Recommended Uses For Product | Calcium supplement for laying chickens, Eggshell strengthener, Chicken health booster |
| Special Ingredients | Calcium Carbonate |
| Specific Uses For Product | Bone Health, Growth, Healthy Egg shells |
| Target Species | Chicken |
| UPC | 737488079470 |
| Unit Count | 64 Ounce |

## Product Details

- **Age Range (Description):** All Life Stages
- **Brand:** Mile Four
- **Flavor:** Unflavored
- **Item Form:** Granule
- **Specific Uses For Product:** Bone Health, Growth, Healthy Egg shells

## Images

![- Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag | Strengthens Eggshells & Bones; High-Calcium Supplement for Laying Hens; 100% Natural Limestone; USA Sourced; Non-GMO - Image 1](https://m.media-amazon.com/images/I/81ULiKfAyEL.jpg)

## Available Options

This product comes in different **Size, Flavor** 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
- Eaton Pet and Pasture, Premium Laying Hen Nesting Pads, USA Grown & Sustainably Harvested, 13 x 13 (10 Pack)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-11*