Overcoming Thin and Cracked Eggshells in Laying Hens: Main Causes and Economic Impact

Thin eggshells are a serious problem often faced by commercial laying hen farmers. This condition not only lowers egg quality but also causes economic losses due to a high percentage of cracked and broken eggs. In this article, we will discuss the main causes of thin eggshells, their economic impact, and probiotic-based solutions that can help farmers address this issue naturally and sustainably.

Why Can Eggshells Be Thin?

Thin eggshells are generally caused by impaired calcium absorption, unbalanced nutrition, or stress in hens. Calcium is the main mineral composing the shell, and about 95% of the eggshell consists of calcium carbonate. Laying hens require adequate calcium intake and optimal absorption in the intestines to form thick and strong shells. However, various factors can hinder this process.

Nutritional Factors

Deficiencies in calcium, phosphorus, or vitamin D3 in feed are the most common causes. Vitamin D3 plays a crucial role in calcium metabolism, and without enough of this vitamin, calcium cannot be absorbed efficiently. Additionally, an imbalanced calcium-to-phosphorus ratio can disrupt shell formation.

Management and Stress Factors

Stress due to high barn temperature, overcrowding, or lighting disturbances can trigger the release of the hormone cortisol, which inhibits calcium absorption. Stressed hens tend to eat less, reducing calcium intake. Moreover, disease infections such as Infectious Bronchitis (IB) or Newcastle Disease (ND) can damage the reproductive tract and cause thin shells.

Hen Age Factor

As hens age, the efficiency of calcium absorption decreases. Older hens (>60 weeks) often produce eggs with thinner and more fragile shells. This occurs because the intestine's ability to absorb calcium declines, and calcium reserves in the bones begin to deplete.

Economic Impact of Thin Eggshells

Thin eggshells directly affect farmers' profits. Eggs with thin shells are more prone to cracking during handling, packaging, and transportation. A high percentage of cracked eggs increases the number of rejected eggs (grade B or C) sold at lower prices. In some cases, farmers can lose 5–10% of production due to broken eggs.

Furthermore, consumers tend to avoid eggs with thin shells because they break easily when cooked. This reduces demand and selling prices. On a large scale, losses from thin shells can reach tens of millions of rupiah per month for medium-sized farms.

The Role of Probiotics in Improving Eggshells

Probiotics, especially lactic acid bacteria, have been proven effective in enhancing calcium absorption and improving eggshell quality. The Probiotic Formula for Laying Hens from Biosolution contains three superior bacterial strains that work synergistically to support gut health and calcium metabolism.

Lactobacillus acidophilus and Lactobacillus bulgaricus

Both strains produce lactic acid, which lowers gut pH, making calcium more soluble and absorbable. Lactobacillus acidophilus also helps stabilize gut microbiota, reducing the growth of pathogenic bacteria that can interfere with nutrient absorption. Meanwhile, Lactobacillus bulgaricus has anti-Salmonella activity, protecting hens from infections that can trigger stress and reduce egg quality.

Bacillus coagulans

This strain is unique because it forms heat-resistant spores, allowing it to survive during feed mixing or drinking water application. Bacillus coagulans plays a role in optimizing calcium absorption in the small intestine. By increasing the population of beneficial bacteria, this probiotic helps maintain the integrity of intestinal villi, where nutrient absorption occurs.

How Probiotics Work to Improve Shell Thickness

Probiotics work through several mechanisms to improve eggshell quality:

1. Enhancing Calcium Absorption

Lactic acid bacteria produce organic acids that acidify the gut environment. A lower pH makes calcium more soluble and available for absorption. Additionally, probiotics stimulate the production of phytase enzymes, which help release calcium from phytate bonds in feed.

2. Reducing Oxidative Stress

Oxidative stress can damage intestinal epithelial cells and disrupt nutrient absorption. Probiotics have antioxidant activity that protects the gut from free radical damage. With a healthy gut, absorption of calcium and other minerals becomes more efficient.

3. Boosting Immunity

Probiotics stimulate the mucosal immune system of the gut, making hens more resistant to infections that can disrupt egg production. Healthy hens have better calcium metabolism and produce eggs with thicker shells.

Application of Probiotic Formula for Laying Hens

For optimal results, the Probiotic Formula for Laying Hens is applied through drinking water at a dose of 1 ml per liter of water, given daily during the production period, preferably in the morning. This method is easy to implement and requires no special equipment. As a result, egg production can increase by 3–5%, shells become thicker and more uniform, and cases of cracked eggs are significantly reduced.

Other Strategies to Prevent Thin Shells

In addition to using probiotics, farmers need to pay attention to the following management aspects:

Balanced Feed

Ensure feed contains 3.5–4% calcium and 0.35–0.45% phosphorus with the correct ratio. Add a source of vitamin D3 or ensure hens get enough sunlight. Providing grit or oyster shell also helps supply additional calcium.

Stress Management

Maintain a comfortable barn temperature (18–25°C), provide good ventilation, and avoid overcrowding. Consistent lighting (16 hours of light) is also important to maintain production rhythm.

Health Monitoring

Conduct routine vaccinations to prevent diseases affecting the reproductive tract. Observe signs of stress or infection in hens, such as decreased appetite or changes in droppings.

Conclusion

Thin eggshells in laying hens are a multifactorial problem that requires a holistic approach. By understanding the main causes—nutrition, stress, and age—farmers can take appropriate preventive measures. The use of probiotics such as Probiotic Formula for Laying Hens offers a natural solution to enhance calcium absorption, improve shell quality, and reduce economic losses. For more information, consult our technical team via WhatsApp.

FAQ

What are the main causes of thin eggshells?

The main causes include deficiencies in calcium, phosphorus, or vitamin D3 in feed, stress due to high temperature or overcrowding, disease infections such as Infectious Bronchitis, and old hen age. All these factors disrupt calcium absorption in the intestines.

How can probiotics improve eggshells?

Probiotics such as Lactobacillus acidophilus and Bacillus coagulans help lower gut pH, making calcium more soluble and absorbable. They also improve gut health and immunity, indirectly supporting the formation of thicker shells.

What is the dosage of Probiotic Formula for Laying Hens?

The recommended dose is 1 ml per liter of drinking water, given daily during the production period. It is best administered in the morning for optimal results. This product is safe and easy to use.

Can probiotics replace calcium supplements?

Probiotics do not replace calcium supplements but help absorb the calcium already present in the feed. For best results, ensure the feed contains adequate and balanced calcium.

How long does it take to see results?

Improvement in shell quality is usually observed after 2-3 weeks of regular use. Egg production can also increase by 3-5% within the same period.