Why Chickens Lay Soft Shell Eggs: 10 Reasons and Fixes

Finding a soft, rubbery, or shell-less egg in your coop can be alarming—especially if you’re new to backyard chickens. Soft eggs (also called soft-shelled eggs or shell-less eggs) are fairly common, particularly in young or stressed hens. The good news: most causes are identifiable and fixable.

This in-depth guide explains why chickens lay soft shell eggs, how to diagnose the cause, and the best ways to fix and prevent the problem.

What Is a Soft Egg?

A normal egg has:

• A hard calcium shell
• Inner membranes
• Egg white (albumen)
• Yolk

A soft egg lacks a fully formed shell. It may feel:

• Rubbery
• Thin and fragile
• Completely shell-less (just a membrane)

Usual Egg Textures (Shell Qualities)

• Smooth & Rigid: The standard, healthy eggshell texture.
• Slightly Matte/Bloom: Fresh eggs have a thin, protective coating (the “bloom”) that makes them feel slightly matte or powdery, rather than glossy.

Unusual Egg Textures (Shell Abnormalities)

• Calcium Deposits/Pimpled Eggs: Rough, raised bumps that feel like sand or small rocks. These are caused by excess calcium or a malfunction in the shell gland, often producing a “sandy” texture.
• Wrinkled/Corrugated Eggs: The shell appears wrinkled like a raisin or has longitudinal ridges, often caused by stress, illness (e.g., bronchitis), or a tired shell gland in older hens.
• Soft-Shelled/Rubbery Eggs: Eggs laid without a fully hardened shell, often having a thin, rubbery membrane. These are common in young, inexperienced hens or due to a lack of calcium or vitamin D.
• Misshapen Eggs: Irregular shapes, such as overly pointy, “slab-sided” (flat-sided), or extremely long eggs.
• Fairy/Fart Eggs: Tiny eggs, often with no yolk, which can have an unusually thin or, conversely, a very tough texture.
• Lash Eggs: Not truly an egg, but a hard or rubbery mass of tissue passed by the hen, often indicating a severe infection.

So, Why Do Chickens Lay Soft Eggs?

There isn’t a single cause. Soft eggs usually result from nutrition, health, age, or environmental issues. Let’s break down the most common reasons.

1. Calcium Deficiency (Most Common Cause)

Why It Happens

Eggshells are made primarily of calcium carbonate. If a hen doesn’t get enough calcium, her body cannot produce a hard shell.

Signs

• Thin or soft shells
• Misshapen eggs
• Reduced egg production

Fix

• Provide oyster shells or crushed eggshells free-choice
• Use high-quality layer feed (16–18% protein)
• Avoid feeding only grains or kitchen scraps

2. Vitamin D Deficiency

Why It Matters

Vitamin D helps chickens absorb calcium. Without it, even a calcium-rich diet won’t help.

Causes

• Lack of sunlight
• Poor-quality feed

Fix

• Ensure sunlight exposure (6–8 hours daily)
• Use fortified poultry feed
• Consider supplements if needed

3. Young Hens (Pullet Phase)

Why It Happens

New layers (pullets) are still developing their egg-laying system.

What to Expect

• Soft eggs
• Odd shapes
• Small eggs

Fix

• No action needed
• Eggs usually normalize within 2–4 weeks

4. Stress

Triggers

• Predator attacks or threats
• Loud noises
• Extreme heat or cold
• Overcrowding

Effects

Stress disrupts the hen’s reproductive cycle, leading to incomplete shell formation.

Fix

• Keep coop calm and secure
• Provide adequate space (4 sq ft per bird minimum)
• Maintain consistent routines

5. Heat Stress

Why It Matters

High temperatures reduce:

• Feed intake
• Calcium absorption

Signs

• Panting
• Reduced egg production
• Thin or soft shells

Fix

• Provide shade and ventilation
• Add electrolytes to water
• Ensure constant access to fresh, cool water

6. Poor Diet or Imbalanced Nutrition

Problem

Feeding too many treats or scraps dilutes essential nutrients.

Fix

• Stick to balanced commercial layer feed
• Limit treats to <10% of diet

7. Illness or Disease

Certain diseases can cause soft eggs, including:

• Infectious Bronchitis
• Egg Drop Syndrome
• Newcastle Disease

Signs to Watch

• Lethargy
• Drop in egg production
• Respiratory symptoms

Fix

• Isolate affected birds
• Consult a veterinarian

8. Aging Hens

Why It Happens

Older hens naturally produce:

• Thinner shells
• More irregular eggs

Fix

• Increase calcium intake
• Accept natural decline in egg quality

9. Obesity or Overfeeding

Overweight chickens may have:

• Reproductive issues
• Poor egg formation

Fix

• Reduce high-calorie treats
• Encourage movement

10. Lack of Clean Water

Water is essential for:

• Nutrient absorption
• Egg formation

Fix

• Provide fresh water daily
• Clean waterers regularly

Best Overall Products for Soft Shell Eggs

Manna Pro Oyster Shell: Best Long-Term Fix

Manna Pro Oyster Shell is one of the most trusted long-term calcium supplements for laying hens with soft-shell egg problems. The crushed oyster shell provides slow-release calcium that hens digest overnight while eggshells are forming.

Unlike mixed feed supplements, chickens naturally consume only the amount they need. Regular use helps improve shell thickness, supports bone strength, and reduces shell-less or thin-shelled eggs in backyard flocks.

Growel Agrovet Grow-Cal D3: Best Fast Recovery Supplement

Growel Agrovet Grow-Cal D3 is designed to quickly support hens already laying soft or rubbery eggs. It combines calcium with Vitamin D3, which is essential for proper calcium absorption and shell formation.

This supplement works especially well during recovery periods, after stress, or when hens suddenly begin laying weak-shelled eggs. Many poultry keepers use it as a short-term boost alongside oyster shell and quality layer feed.

Sav-A-Chick Electrolyte and Vitamin Supplement: Best for Summer Heat

Sav-A-Chick Electrolyte and Vitamin Supplement is highly useful during hot weather when hens drink more water but eat less feed. Reduced feed intake often lowers calcium and mineral consumption, leading to soft-shell eggs.

This supplement helps restore hydration, vitamins, and electrolytes lost during heat stress. It also supports energy levels and overall laying performance, making it a valuable product for summer flock management and preventing temporary shell quality problems.

Nutri-Drench Poultry: Best Complete Nutrition Support

Nutri-Drench Poultry is a concentrated nutritional supplement made for weak, stressed, recovering, or poorly laying hens. It contains vitamins, minerals, amino acids, and energy-support ingredients that are quickly absorbed into the bird’s system.

Poultry owners often use it after illness, transport stress, heat exhaustion, or sudden drops in egg quality. While it is not strictly a calcium product, it helps improve overall hen health, which can indirectly support stronger eggshell production.

Virbac Calgophos: Best for weak or stressed hens

Virbac Calgophos is a nutritional supplement designed to support weak, stressed, or recovering laying hens. It contains calcium and phosphorus, two essential minerals needed for proper eggshell formation and bone health. Poultry keepers commonly use it after illness, heat stress, or reduced egg production to help improve shell quality, restore strength, and support healthier laying performance.

How to Fix Soft Eggs Quickly

If you notice soft eggs, take these steps immediately:

Add Calcium

• Oyster shells (best option)
• Crushed eggshells

Improve Feed Quality

• Switch to layer feed
• Avoid low-protein diets

Check Environment

• Reduce stress
• Improve coop conditions

Ensure Sunlight

• At least 6 hours/day

Monitor Flock Health

• Watch for signs of illness

How Long Does It Take to Fix the Problem?

• Nutritional issues: 1–2 weeks
• Young hens: 2–4 weeks
• Stress-related: depends on conditions

Consistency is key.

Are Soft Eggs Safe to Eat?

Yes—but with caution:

• If clean and fresh → safe to cook
• If dirty or broken → discard

Always cook thoroughly.

Can Soft Eggs Harm Chickens?

Yes, frequent soft eggs can lead to:

• Egg binding
• Internal laying issues
• Weak overall health

That’s why it’s important to fix the cause early.

Prevention Tips

1. Provide Balanced Nutrition

• High-quality layer feed
• Calcium supplements

2. Maintain Clean Coop

• Dry bedding
• Proper ventilation

3. Reduce Stress

• Protect from predators
• Avoid overcrowding

4. Ensure Sunlight

• Outdoor access daily

5. Monitor Regularly

• Check eggs daily
• Watch for changes

When to Worry

Contact a vet if:

• Soft eggs persist beyond 2–3 weeks
• Multiple hens are affected
• You see signs of illness

Related FAQ’s

1. Why is my chicken laying soft eggs suddenly?

Usually due to calcium deficiency, stress, or heat.

2. Can soft eggs be eaten?

Yes, if fresh and clean, but always cook them thoroughly.

3. How do I give calcium to chickens?

Provide oyster shells or crushed eggshells.

4. How long do soft eggs last?

They spoil faster—use immediately or discard.

5. Do soft eggs mean my chicken is sick?

Not always—often it’s just diet or age-related.

6. Can heat cause soft eggs?

Yes, heat stress reduces calcium absorption.

7. Will young chickens lay soft eggs?

Yes, it’s common in the first few weeks.

8. How can I prevent soft eggs?

Balanced diet, calcium, sunlight, and low stress.

9. Can lack of water cause soft eggs?

Yes, dehydration affects egg formation.

10. When should I call a vet?

If the issue lasts more than 2–3 weeks or spreads.

Final Thoughts

Soft eggs are a common but manageable issue in backyard flocks. In most cases, the solution is simple:

• Improve nutrition
• Add calcium
• Reduce stress

With proper care, your chickens will quickly return to laying strong, healthy eggs

Reference Links

Here are trusted sources for further reading:

1. University of Florida IFAS – Eggshell Quality
   https://edis.ifas.ufl.edu/
2. RSPCA – Laying Hens Health
   https://www.rspca.org.uk/

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