Transforming Egg Production: The Rise of Antibiotic-Free Feed in the Layer Industry

To address issues such as drug residues and bacterial resistance, antibiotic-free livestock feed formulations have emerged. These feeds are characterized by the absence of antibiotics in their composition. The World Health Organization (WHO) strongly recommends reducing the use of all critical antibiotics in food-producing animals, including a complete ban on using these antibiotics for growth promotion and disease prevention without a diagnosis.

Antibiotic-free feed formulations rely on natural additives such as probiotics, prebiotics, enzymes, organic acids, and plant extracts to maintain animal gut health, enhance immunity, and promote growth. These additives help support the health of livestock, such as chickens, while reducing the need for antibiotics. However, it is important to note that chickens raised entirely without antibiotics may face a higher likelihood and severity of diseases.

Environmental Benefits of Antibiotic-Free Feed

The adoption of antibiotic-free livestock feed formulations offers several environmental benefits:

1. Reduced Antibiotic Pollution: Minimizes contamination of soil and water caused by antibiotic use.
2. Promotes Biodiversity and Ecosystem Health: Supports a more balanced ecosystem by reducing disruptions caused by antibiotics.
3. Lower Greenhouse Gas Emissions: Contributes to reducing the carbon footprint associated with livestock farming.

By shifting to antibiotic-free feed formulations, the livestock industry can address both public health concerns and environmental challenges.

Current Status of the Layer Industry

The layer industry plays a significant role in livestock production, providing humans with an essential source of protein. Traditional layer feed formulations are primarily composed of grains, protein supplements, mineral supplements, and vitamin supplements.

To control coccidiosis, anticoccidial drugs are often added to the feed. For resting hens without stopping feeding, methods include using wheat bran, mixed feeds of wheat bran and corn, corn gluten feed, soybean hulls, or alfalfa. The nutritional requirements of layer feed vary depending on factors such as the hen's weight, age, growth rate, egg production rate, weather, and additional nutrients obtained from foraging.

Environmental Performance in Egg Production

A 50-year study (1960–2010) analyzing environmental performance indicators of U.S. egg production showed significant improvements in sustainability. Key findings include:

• 71% reduction in greenhouse gas emissions during egg production.
• 32% reduction in water usage.
• Over 50% decrease in feed consumption. 

Challenges of Antibiotic-Free Feeds

Even without antibiotics, antibiotic-free feeds often rely on commodity crops like genetically modified soybeans and corn. These crops are associated with intensive farming practices that have their own environmental impacts.

Environmental Impact of the Layer Industry

The layer industry has several environmental impacts, primarily:

1. Greenhouse Gas Emissions: Arising during feed production.
2. Manure Pollution: Chicken manure contributes to soil and water contamination.
3. Energy Consumption and Land Use: Required for feed production and farm operations.

Efforts to mitigate these impacts are crucial for ensuring the sustainability of the layer industry.

Common Diseases in Layers

The layer industry faces threats from various diseases that can lead to decreased egg production, increased mortality rates, and economic losses. Common diseases include:

• Avian Influenza: A viral infectious disease that can cause high mortality rates.
• Newcastle Disease: A viral disease affecting the respiratory, nervous, and digestive systems of chickens.
• Coccidiosis: An intestinal disease caused by parasites, leading to diarrhea, stunted growth, and death.

Preventing and treating these diseases are critical challenges for the layer industry, and antibiotic-free feed formulations provide a more sustainable solution.

Application of Antibiotic-Free Feed in the Layer Industry

Impact on Hen Health and Production Performance

Antibiotic-free feed formulations can improve the health and production performance of layers. Research shows that antibiotic-free feed can:

• Enhance hen immunity.
• Improve gut health.
• Increase egg production rates and quality. 
• Reduce hen mortality rates.

However, transitioning to antibiotic-free feed poses challenges for poultry producers, such as poor gut health, decreased immunity, and reduced growth performance. Studies also indicate that in antibiotic-free rearing environments, hen health and welfare may be negatively affected. 

To address these challenges, producers can adopt strategies such as using feed disinfectants to reduce microbial loads in feed, thereby improving hen health and production performance.

Impact on Egg Quality

Antibiotic-free feed formulations can enhance the nutritional value of eggs by increasing the content of omega-3 fatty acids, vitamin E, and β-carotene. Additionally, they improve internal egg qualities such as yolk color, size, and firmness. This is because the nutrients in antibiotic-free feed, such as vitamins, minerals, and pigments, are more effectively absorbed by hens.

Comparison with Traditional Feeds

Application of Organic Acids

In antibiotic-free feed formulations, organic acids play a significant role. Organic acids, such as citric acid, short-chain fatty acids (e.g., acetic acid, butyric acid), and medium-chain fatty acids (e.g., lauric acid, caproic acid), have unique properties and serve various purposes in poultry production. They can:

• Improve gut health.
• Enhance immunity.
• Promote growth.

Application Cases of Antibiotic-Free Feed in the Layer

Industry Many layer farms have adopted antibiotic-free feed formulations, such as Gallinita Libre. In the U.S., all egg production is technically antibiotic-free. Layer farms implement strict biosecurity measures, such as limiting personnel access, to prevent disease transmission. In recent years, the sale of antibiotics for food-producing animals in the U.S. has declined, with chickens accounting for only 5% of medically important antibiotic sales. These trends indicate the growing adoption of antibiotic-free feed formulations in the poultry industry.

In broiler production, the success of on-farm hatching also demonstrates an effective method for reducing antibiotic use. On-farm hatching involves transporting fertilized eggs to farms for hatching, allowing chicks to have immediate access to feed and water.

Future Development Trends of Antibiotic-Free Feed in the Layer Industry

• Growing Consumer Demand: Demand for antibiotic-free eggs will continue to rise as consumers prioritize health and sustainable food choices.
• Stronger Government Regulations: Regulations on antibiotic use in livestock production will become stricter.
• Broader Application of Natural Additives: Natural additives, such as plant extracts and essential oils, will play a significant role in antibiotic-free poultry production.
• Technological Advancements: The shift to antibiotic-free production will require a systemic approach, involving chicks, hens, hatcheries, broiler farms, feed quality, and robust biosecurity measures.
• Potential Cost Increases: The costs of antibiotic-free poultry production may rise, and strategies will be needed to address potential negative effects on gut microbiota composition caused by the phase-out of antibiotics.
• Reduction in Medically Important Antibiotics: Minimizing the use of these antibiotics in poultry production remains crucial.

Environmentally friendly, antibiotic-free livestock feed formulations in the layer industry bring significant benefits, including improved hen health and production performance, enhanced egg quality, reduced environmental pollution, and meeting consumer demands for food safety and animal welfare.

While transitioning to antibiotic-free production poses challenges, such as increased costs and potential health issues for hens, these can be effectively addressed through the use of alternatives such as feed disinfectants, probiotics, prebiotics, enzymes, organic acids, and plant extracts, along with strengthened biosecurity measures and improved management practices.

With technological advancements and rising consumer awareness, antibiotic-free feed formulations will become a key development trend in the layer industry, contributing to environmental sustainability and food safety. The adoption of antibiotic-free feed is not only an innovation in the layer industry but also a critical step toward sustainable agriculture.

References

1. 5 Ways Foods Free of Antibiotics And Hormones Are Better For You And Your Loved Ones, 檢索日期：1月 21, 2025
2. Stop using antibiotics in healthy animals to prevent the spread of antibiotic resistance - World Health Organization (WHO), 檢索日期：1月 21, 2025
3. Raised without antibiotics: impact on animal welfare and implications for food policy - PMC, 檢索日期：1月 21, 2025
4. The Benefits of Antibiotic-Free Meat for Health and the Environment - superior farms denver, 檢索日期：1月 21, 2025
5. Poultry feed - Wikipedia, 檢索日期：1月 21, 2025
6. FEEDING CHICKENS FOR EGG PRODUCTION IN SMALL AND BACKYARD FLOCKS - Poultry Extension, 檢索日期：1月 21, 2025
7. Landmark 50-Year Study Documents U.S. Egg Industry Reduced Environmental Footprint, 檢索日期：1月 21, 2025
8. Antibiotic-Free”: Industrial Farming with a Nice-Sounding Label - - A Greener World, 檢索日期：1月 21, 2025
9. Performance and environmental impact of egg production in response to dietary supplementation of mannan oligosaccharide in laying hens: a meta-analysis - PMC, 檢索日期：1月 21, 2025
10. The FoodPrint of Eggs, 檢索日期：1月 21, 2025
11. Environmental footprint of the egg industry | ScienceDaily, 檢索日期：1月 21, 2025
12. Poultry Antibiotic Market Size, Trends and Forecast to 2030, 檢索日期：1月 21, 2025
13. Beware of The Hidden Dangers of Antibiotics Contaminated Eggs - Petros Farms, 檢索日期：1月 21, 2025
14. Antibiotic-free egg production in poultry farming - Veterinaria Digital, 檢索日期：1月 21, 2025
15. The impact of feed quality on poultry health & performance in the antibiotic-free era, 檢索日期：1月 21, 2025
16. Antimicrobial Use in On-Farm Hatching Systems vs. Traditional Hatching Systems: A Case Study - PubMed, 檢索日期：1月 21, 2025
17. Antibiotic-free poultry production: All you need to know - Alltech, 檢索日期：1月 21, 2025
18. Raising Animals Without Antibiotics: U.S. Producer and Veterinarian Experiences and Opinions - Frontiers, 檢索日期：1月 21, 2025
19. Potential Feed Additives as Antibiotic Alternatives in Broiler Production - PMC, 檢索日期：1月 21, 2025
20. Antibiotic-free chicken and eggs in the Mexican poultry market ..., 檢索日期：1月 21, 2025
21. Egg Carton Labeling Terms - Illinois Department of Agriculture, 檢索日期：1月 21, 2025
22. Disease Prevention on Commercial Farms | Usapeec, 檢索日期：1月 21, 2025
23. Antibiotics on the Farm - United Egg Producers - UEP Certified, 檢索日期：1月 21, 2025
24. Antimicrobial Use in On-Farm Hatching Systems vs. Traditional Hatching Systems: A Case Study - MDPI, 檢索日期：1月 21, 2025
25. Managing gut health – a key challenge in ABF broiler production - EW Nutrition, 檢索日期：1月 21, 2025
26. The future of antibiotics in poultry feed, 檢索日期：1月 21, 2025
27. Antibiotic-free and reduced antibiotic use in broiler production | The Poultry Site, 檢索日期：1月 21, 2025