How to Dry Eggshells for Chickens: Natural Calcium Supplement for Healthy Hens
If you raise backyard chickens, you probably want to make the most of the eggs they give you, including the shells. Instead of throwing them away, you can dry and crush eggshells into a calcium supplement that supports strong eggshell formation, healthy laying cycles, and overall chicken health.
In this guide, you will learn how to prepare eggshells safely, discover why calcium is so important, find answers to common questions about feeding eggshells to hens, and explore other surprising uses for eggshells around the homestead.
Why Calcium Matters for Chickens
Calcium is essential for egg-producing hens. Without enough calcium, hens can experience:
- Thin or brittle eggshells
- Misshapen eggs
- Egg binding
- Weak bones
- Reduced egg production
During eggshell formation, a hen can lose up to 30% of her body’s calcium. That is a huge demand on her system. Many chicken keepers provide supplements like crushed oyster shell or homemade eggshell calcium to meet this need naturally.
How to Dry Eggshells (Step by Step)
Drying eggshells before crushing them prevents mold and makes it easier to crush for your hens. Here is the process:
Step 1: Rinse the Shells
Quickly rinse the eggshells to remove egg residue. You do not need to wash them perfectly, just remove the greasy film.
Step 2: Drain and Pat Dry
Place shells on a clean towel or wire rack and allow them to air dry for a few hours.
Step 3: Oven Dry (Optional for Speed)
Preheat your oven to 200°F (93°C).
Spread the shells on a baking sheet and bake for 10–15 minutes until completely dry.
Tip: Watch carefully. The goal is drying, not roasting.
Step 4: Cool Before Crushing
Let shells cool fully to prevent steam-softened fragments.
Step 5: Crush or Grind
You can crush shells by hand using a rolling pin, or use:
- Coffee grinder
- Blender
- Food processor
- Mortar and pestle
Goal: Small, manageable pieces (think 1/4 to 1/2 inch). You can also grind into a powder.
Step 6: Store in an Airtight Container
Keep the eggshells dry in a sealed jar for future use.
How to Feed Eggshells to Chickens
- Free Choice: Place in a small dish so hens can eat as needed.
- Mix with Feed: Stir a spoonful into their layer feed.
- Avoid Overfeeding: Calcium is beneficial, but too much can be harmful. Use carefully.
Frequently Asked Questions
Q: Can chickens eat raw eggshells?
Yes, but only after they have been cleaned, dried, and crushed. Raw shells straight from the egg may attract pests, harbor bacteria, or have sharp edges.
Q: How much eggshell supplement should I give my hens?
Offer it free choice in a separate dish, similar to commercial oyster shell. Hens will eat what they need.
Q: Can eggshells replace oyster shell?
Yes. Eggshell calcium is one of the best natural alternatives and is easily absorbed by hens.
Q: Will feeding eggshells cause cannibalism?
No. Crushed eggshells do not trigger egg eating. In fact, providing calcium can help prevent it.
Benefits of Eggshell Calcium
Homemade eggshell calcium provides:
- Strong, healthy eggshells
- Reduced risk of broken, thin, or soft eggs
- Lower chance of egg binding
- Natural, zero-waste supplementation
- Cost savings because you already have the shells
Other Uses for Eggshells
Eggshells are useful beyond feeding your flock. They can improve your homestead in many ways:
In the Garden
- Soil Amendment: Adds calcium to vegetable beds, especially for tomatoes and peppers.
- Slug Deterrent: Crushed shells can help keep slugs and snails away.
- pH Balancer: Calcium can neutralize acidic soils.
Compost Booster
Add shells to compost for extra minerals and better decomposition.
For Worm Bins
Reduces acidity and provides calcium for healthier worm castings.
DIY Projects
Crushed eggshells can be used in mosaics, stepping stones, or homemade seed starter pots.
Tips from Homesteaders
- Store shells in a lidded container on your counter. Rinse daily and bake weekly.
- Label containers to separate fresh from dried shells.
- Do not add salt or seasoning. Your chickens and garden plants do not need it.
Conclusion
Drying and crushing eggshells is one of the most practical, sustainable hacks for homestead chicken keepers. It provides a natural calcium boost for your hens, reduces kitchen waste, and improves your garden soil. Whether you are new to raising layers or an experienced keeper, this simple practice will help your flock thrive and make your homestead more self-sufficient.
Happy homesteading, friend!
XO, Bri
Homestead Chicken Resources
Explore our homestead chicken resources for beginner-friendly guides on raising backyard chickens, natural poultry care, coop setup, feeding, egg production, and simple flock management.
More Homesteading Resources for Simple Living
If you are working toward a more self-sufficient lifestyle, these simple homesteading tips, DIY projects, and beginner-friendly guides will help you create a cozy, sustainable home one step at a time.
Let’s Stay Connected!
Join me on social media to get the latest homestead tips, easy DIY projects, backyard chicken care advice, cozy home inspiration, and sustainable living ideas straight to your feed.
