--- product_id: 741921610 title: "Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag" brand: "mile four" price: "₨1430" currency: SCR in_stock: true reviews_count: 5 category: "Mile Four" url: https://www.desertcart.sc/products/741921610-mile-four-oyster-shell-for-egg-laying-hens-calcium-booster store_origin: SC region: Seychelles --- # Dual particle size for immediate + slow calcium release 94-97% calcium carbonate for stronger eggshells 100% USA-sourced natural limestone Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag **Brand:** mile four **Price:** ₨1430 **Availability:** βœ… In Stock ## Summary > πŸ₯š 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 by mile four - **How much does it cost?** ₨1430 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/741921610-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 - β€’ **Backyard Flock Favorite:** Trusted by over 5,000 poultry enthusiasts who demand healthier hens and stronger eggs. - β€’ **Pure & Proudly American:** Non-GMO, additive-free oyster shell limestone mined exclusively in the USA for trusted quality. - β€’ **Smart Free-Choice Feeding:** Let your flock self-regulate calcium intake naturallyβ€”no overfeeding, no waste. - β€’ **Stronger Eggs, Fewer Breaks:** Boost eggshell durability with 94-97% pure calcium carbonateβ€”say goodbye to fragile eggs. - β€’ **Tailored for Laying Hens 20+ Weeks:** Optimized calcium support for mature hens to maintain peak egg production and bone health. ## Overview Mile Four Oyster Shell is a premium, 100% natural calcium supplement made from USA-mined limestone. Designed for laying hens 20+ weeks old, it combines fine and coarse particles to provide both immediate and sustained calcium release, strengthening eggshells and supporting bone health. Free-choice feeding ensures hens consume exactly what they need, making it a trusted choice for over 5,000 backyard flock owners seeking healthier, more resilient eggs. ## 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 (CaCO3) mined from limestone in the USA. Fine particles provide an immediate calcium supply while coarse particles provide a slower, steady calcium release, giving hens a consistent calcium release into their bloodstream overnight for stronger eggs and stronger bones. Eggshells are 94-97% calcium carbonate, so oyster shell is an organic, natural way to give laying hens the calcium boost needed to produce strong eggshells that will not break. Review: Great price and fast delivery - It a great dietary supplement for your chickens Review: Quality calcium for your laying hens - Excellent additional source of calcium for laying hens and they love it. Will have to set up routine shipments. ## 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 | | Additional Features | Natural Product Environmentally Friendly, organic | | Age Range Description | Adult | | Age range (description) | Adult | | Animal Food Diet Type | Raw | | Animal Food Ingredient Claim | Additive-Free | | Best Sellers Rank | #50,084 in Pet Supplies ( See Top 100 in Pet Supplies ) #751 in Bird Food | | Brand | Mile Four | | Brand Name | Mile Four | | Breed Recommendation | All Breed Sizes | | Container Type | Bag | | Customer Reviews | 4.5 out of 5 stars 176 Reviews | | Flavor | Unflavored | | Flavour | Unflavored | | Global Trade Identification Number | 00737488079470 | | Item Form | Granule | | Item Weight | 1.81 kg | | Item form | Granule | | 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 | Stronger, more durable eggshells | | Recommended Uses For Product | Calcium supplement for laying chickens, Eggshell strengthener, Chicken health booster | | Special Ingredients | Calcium Carbonate | | Special ingredients | Calcium Carbonate | | Specific Uses For Product | Bone Health, Growth, Healthy Egg shells | | Specific uses for product | Bone Health, Growth, Healthy Egg shells | | Target Species | Chicken | | UPC | 737488079470 | | Unit Count | 64 Grams | ## Product Details - **Age range (description):** Adult - **Brand:** Mile Four - **Flavour:** Natural - **Item form:** Solid - **Specific uses for product:** Behavior, Stomach, Teeth, Weight ## Images ![Mile Four Oyster Shell for Egg-Laying Hens, Calcium Booster, 4 lbs Bag - Image 1](https://m.media-amazon.com/images/I/81ULiKfAyEL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great price and fast delivery *by J***A on 2 March 2026* It a great dietary supplement for your chickens ### ⭐⭐⭐⭐⭐ Quality calcium for your laying hens *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. ### ⭐⭐⭐⭐⭐ Hard shells *by L***Y on 26 August 2026* The goal is to keep egg shells hard and this does the trick. ## 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) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sc/products/741921610-mile-four-oyster-shell-for-egg-laying-hens-calcium-booster](https://www.desertcart.sc/products/741921610-mile-four-oyster-shell-for-egg-laying-hens-calcium-booster) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-10-02*