The Problem of Egg Eating in Chickens: Causes and Remedies

Egg eating is a frustrating and potentially costly behavior in chickens. It commonly begins when a hen finds a cracked or broken egg. Promptly reducing egg breakage and access to eggs is the best way to keep the behavior from becoming established.

What Causes Egg Eating?

Egg eating is usually connected to management conditions that make breakage or access more likely. Several factors may occur at the same time.

Broken or Weak-Shelled Eggs

An accidentally broken egg can introduce a hen to its contents. Thin shells, crowded nests, hard nest floors, insufficient bedding or birds jumping down onto eggs all increase the opportunity for breakage.

Nutrition and Water

• A nutritionally unbalanced ration can reduce shell quality and make eggs easier to break.
• Too much scratch grain, table food or treats may dilute a complete layer ration.
• Laying hens need constant access to clean water and an age-appropriate complete feed.
• Free-choice oyster shell or another suitable calcium source may be offered separately to laying hens. Do not add excessive calcium directly to a balanced feed.

Egg eating alone does not prove that a hen has a calcium or protein deficiency. If shells remain thin despite a suitable ration, investigate the bird’s age, health, feed intake and other possible causes with a veterinarian or poultry nutrition professional.

Poor Nesting Conditions

• Too few nest boxes can create crowding and broken eggs.
• Hard, dirty or poorly padded nests fail to cushion newly laid eggs.
• Bright, exposed nests leave eggs more visible and accessible.

Infrequent Collection

The longer eggs remain in the nest, the greater the opportunity for breakage, pecking and contamination.

Stress, Crowding and Lack of Activity

Overcrowding, competition, excessive light, limited feeder space and few opportunities to forage can increase unwanted pecking behaviors. Correcting these conditions supports overall flock welfare even when they are not the only cause.

Why the Behavior Matters

• Lost eggs: Fewer intact eggs remain for eating, selling or hatching.
• Learned behavior: Other birds may investigate and copy a hen eating a broken egg.
• Food safety: Pecked, cracked or leaking eggs can become contaminated and should be discarded.
• Hidden management problems: Repeated breakage may signal inadequate nests, poor shell quality or flock stress.

How to Prevent and Stop Egg Eating

1. Prevent Egg Breakage

• Provide approximately one nest for every four or five hens.
• Keep nests clean, dry, dim and comfortably padded.
• Replace soiled bedding and clean up broken eggs immediately.
• Check nest construction for sharp edges, steep entrances and hard landing points.

2. Collect Eggs Frequently

Collect eggs at least two or three times daily when a problem is occurring, including a morning collection during peak laying. More frequent collection may be helpful in a busy nest.

3. Feed a Complete Layer Ration

• Make a complete feed formulated for laying hens the foundation of the diet.
• Limit scratch grain and treats so they do not replace the balanced ration.
• Offer free-choice oyster shell in a separate container when appropriate.
• Keep clean, fresh water available at all times.

4. Improve Space and Enrichment

• Reduce crowding and provide enough feeder, waterer, perch and nest space.
• Offer safe opportunities for foraging, scratching and dust bathing.
• Use hanging greens or other poultry-safe enrichment without overfeeding treats.

5. Make Eggs Harder to Reach

• Roll-away nest boxes can move eggs out of reach soon after laying.
• Ceramic or wooden dummy eggs may discourage persistent exploratory pecking.
• Keep the nest area darker than the rest of the house while maintaining safe access and ventilation.

6. Identify the Bird and Correct the Cause

Observe the flock calmly to determine where breakage begins. Dried egg on a beak or head may offer a clue, but it is not proof that the bird deliberately broke the egg. If temporary separation is needed to observe an individual, provide appropriate feed, water, shelter and companionship within sight of the flock, and avoid prolonged isolation. Separation alone will not correct poor nesting, nutrition or management.

Do not eat eggs with pecked, cracked or leaking shells. Remove them promptly, clean contaminated nesting material and wash your hands after handling broken eggs.

A Practical Response Plan

1. Remove every broken egg and replace soiled nest material.
2. Collect intact eggs several times each day.
3. Check the complete ration, water supply and free-choice calcium source.
4. Add or improve nest boxes and cushioning.
5. Reduce crowding, bright nest lighting and environmental stress.
6. Consider roll-away nests if the problem persists.
7. Seek veterinary or Extension guidance when thin shells or abnormal laying continue.

Remember

Egg eating is usually easier to prevent than to stop after it becomes established. Focus first on preventing broken eggs, collecting frequently, providing a complete diet and improving the nesting environment. Consistent management gives the flock the best chance to return to normal behavior.

Protect the egg before it breaks: strong shells, cushioned nests and frequent collection make the greatest difference.

References and Additional Reading

• Penn State Extension: Prevention of Egg Eating in Chickens
• Mississippi State University Extension: Causes for Hens Eating Their Eggs
• Ohio State University Extension: Egg Eaters in the Coop
• Damerow, Gail. The Chicken Health Handbook. Storey Publishing.
• Mattocks, Jeff. Niche Poultry: Feeding and Management. Fifth edition. The Fertrell Company.
• Leeson, S., and Summers, J. D. Commercial Poultry Nutrition. Third edition. Nottingham University Press.

This article provides general educational information. Each flock is different, and ongoing thin shells, abnormal laying, illness or major behavioral changes should be discussed with a veterinarian, poultry nutrition professional or Extension specialist.

The MEGA Exhibition Poultry Education Series supports informed decision-making and encourages poultry keepers to make thoughtful choices for their own flocks.