Poultry House Management: Ventilation, Lighting, and Biosecurity Integration

This article provides poultry farmers, farm employees, veterinarians, advisers, students, and farm planners with a practical framework for integrating ventilation, lighting, and biosecurity into a single cohesive house management plan. The focus is on measurable daily and weekly actions that protect bird health, support productivity, and reduce disease risk. The guidance draws on peer-reviewed research and official animal health resources, with emphasis on what you can observe, record, and adjust in your own houses.

At a Glance: The Integrated House Management Framework

Effective poultry house management requires that ventilation, lighting, and biosecurity operate as one system instead of as separate tasks. Ventilation determines air quality and temperature, lighting drives behavior and physiological rhythms, and biosecurity controls pathogen entry and spread. When any one of these three elements fails, the others cannot compensate fully.

The integration point is the daily walkthrough. During each house check, evaluate ventilation performance by observing bird behavior and air quality, confirm the lighting program is running on schedule, and complete biosecurity actions before entering the bird area. This combined routine takes less time than managing each domain separately and produces records that support faster problem detection.

Ventilation Fundamentals for Poultry Houses

Ventilation exists to supply oxygen, conserve or remove sensible and latent heat produced by the birds, and remove air pollutants including ammonia, carbon dioxide, dust, and odors. This core purpose has been recognized in poultry science for decades and remains the foundation of house design and management decisions. The FAO Animal Production and Health program provides international context on how housing and environmental management support sustainable livestock production.

Minimum Ventilation and Air Quality

Minimum ventilation operates during cold weather to control moisture and air quality while conserving heat. The goal is to remove enough air to keep litter dry and ammonia concentrations low without chilling the birds. Research on winter microclimate control in poultry houses with deep bedding has focused on identifying energy-efficient management approaches that maintain required conditions with minimal air exchange. The practical implication is that minimum ventilation rates should be set to meet air quality targets, then adjusted based on litter moisture and bird behavior instead of run at a fixed rate regardless of conditions.

Ammonia is a primary driver of minimum ventilation decisions. Wet litter increases ammonia release, and poor ventilation allows ammonia to accumulate. The relationship between ventilation and pollutant concentrations has been documented in manure-belt layer houses, where ventilation rates directly affect the distribution, concentration, and emission of airborne pollutants. When you detect ammonia odor at bird level, ventilation is inadequate and must be increased immediately.

Pressure and Airflow Distribution

Mechanical ventilation systems rely on static pressure differences to move air through inlets and exhaust fans. Research in a mechanically ventilated Mediterranean broiler house during summer showed that differential pressure ranged from negative to positive values depending on the ventilation mode, with birds exposed to air velocities varying substantially across regulation modes. The same study confirmed that mathematical models based on thermal balance and air properties can predict pressure and velocity with low error, supporting the use of monitoring data for system control improvements.

In large commercial layer houses, differential pressure measurements over six months showed that house pressure remained between negative 10 and negative 30 pascals for about three quarters of the operating time, but strong winds could shift pressure dramatically. Fan rotational speeds varied with pulley sizes and belt maintenance, and on-site fan testing produced reliable data for ventilation characterization. These findings support two practical rules. First, static pressure readings outside the normal operating range indicate inlet or fan problems that need investigation. Second, fan maintenance directly affects ventilation performance, so belt tension and pulley condition deserve scheduled attention.

Tunnel Ventilation and Heat Management

Tunnel ventilation moves air lengthwise through the house at high velocity to create wind chill effect during hot weather. Computational fluid dynamics studies of commercial broiler houses have shown that the number of tunnel fans in operation changes air velocity distribution and that variable inlet configurations can relieve high temperatures but may reduce overall ventilation efficiency or intensify temperature gradients. The practical lesson is that inlet adjustments during tunnel ventilation require careful evaluation because changes that cool one zone can worsen conditions elsewhere.

Evaporative cooling pads combined with exhaust fans are a standard approach for closed-house temperature control. The design of cooling pad components influences pressure drop and airflow patterns entering the room, and numerical simulation helps predict fluid flow distribution in closed houses. When using evaporative cooling, monitor pad condition, water flow, and the pressure drop across the pads. Clogged or dry pads reduce cooling efficiency and increase static pressure demands on the fans.

Ventilation System Options and Tradeoffs

Closed or windowless houses provide better environmental control and biosecurity but increase dependence on electricity, dehumidification, and backup systems. Greenhouse or curtain-sided houses have lower energy use but weaker environmental stability. This tradeoff is particularly important for moisture-dominated houses such as duck facilities, where water access, wet litter, and stocking density make the house latent-load-dominated, affecting relative humidity, ammonia, particulates, heat stress, welfare, and energy demand.

Alternative heating, ventilation, and air conditioning systems have been evaluated for poultry houses using life cycle assessment. Earth-air heat exchangers reduced total life cycle impacts of egg production compared to conventional systems across most impact categories and provinces studied, while ground source heat pumps only reduced impacts in regions with electricity grids driven primarily by renewable energy. When planning system upgrades, evaluate your local climate and electricity grid characteristics instead of assuming one technology is universally superior.

Lighting Programs and Bird Physiology

Light is a critical environmental regulator of biological function in poultry, influencing physiology, behavior, growth, production, and reproduction. Beyond vision, light acts as a zeitgeber that synchronizes circadian rhythms and modulates neuroendocrine signaling and metabolic pathways essential for health and welfare. The USDA National Agricultural Library Animal Health and Welfare collection includes resources on how housing conditions affect animal well-being.

Photoperiod and Melatonin Signaling

Photoperiod, the cyclical exposure to light and darkness, is a master regulator of neuroendocrine function in poultry through the pineal-melatonin axis. The pineal gland translates photic cues into rhythmic melatonin secretion, which synchronizes circadian and seasonal biological processes. Photoperiodic manipulation leverages this axis to enhance energy allocation, feed efficiency, and adaptability to environmental fluctuations. Controlled light regimes can enhance melatonin-dependent benefits including improved egg production, improved meat quality, and welfare promotion.

For practical management, this means the lighting program is not simply about providing visibility. The duration of light and dark periods directly affects hormone rhythms, feed intake patterns, and stress physiology. Changes to the photoperiod should be planned and gradual, because sudden shifts disrupt melatonin rhythms and can trigger behavioral problems.

Light Spectrum, Intensity, and Wavelength Effects

Variations in light wavelength, intensity, and duration significantly regulate feed intake, stress physiology, immune competence, locomotor activity, and overall flock health. Blue and green wavelengths are consistently linked with enhanced growth performance and muscle development, whereas red light preferentially stimulates reproductive activity through activation of the hypothalamic-pituitary-gonadal axis. Optimized lighting programs improve egg production, shell quality, and hatchability while reducing aggression, feather pecking, and other maladaptive behaviors.

Research on pullets found that a combination of 8 to 10 hours of darkness and 5 to 30 lux of light intensity using natural or warm white LED light achieved a welfare-performance balance, with the caveat that this varies by age, strain, and activities. Dark brooders that mimic mother hens have alleviated fear and pecking behaviors in pullets. These findings support using species-appropriate light intensity and spectrum instead of a one-size-fits-all approach.

Species-Specific Lighting Programs

Duck-targeted lighting programs have been evaluated against conventional commercial programs. In a study of Pekin ducks, a dynamic LED lighting program tailored to the species produced no significant differences in production or health parameters compared to a conventional program, but ducks under the tailored program exhibited significantly lower stress indicators including reduced corticosterone, lower heterophil-to-lymphocyte ratios, and decreased asymmetry. Fear responses were also significantly reduced. This demonstrates that species-tailored dynamic lighting can improve welfare without compromising production performance.

For broilers, research comparing natural light provided through windows supplemented with LED against artificial light alone found that birds raised with natural light approached a novel object more quickly, indicating lower fear response, and showed lower footpad dermatitis scores. No treatment effects were found on other welfare parameters measured. The practical implication is that natural light provision may reduce fearfulness and improve foot health, but it does not replace the need for a consistent artificial lighting program.

Biosecurity as a Management System

Biosecurity is the set of practices that prevent pathogen introduction to the farm and pathogen spread between houses and flocks. The World Organisation for Animal Health Animal Health and Welfare program provides international standards for disease prevention and control, and the FDA Animal and Veterinary resources cover regulatory aspects of animal health products and feed safety. Biosecurity must be integrated with ventilation and lighting because air movement can spread pathogens within and between houses, and lighting programs affect bird behavior and immune competence.

Perimeter and Access Control

The biosecurity perimeter defines the boundary between the farm and the outside world. All entries and exits should be logged, including vehicles, people, and equipment. Footbaths should be maintained at the entrance to each house with disinfectant changed according to the product label or more frequently when visibly contaminated. Visitor access should be restricted to essential personnel, and farm employees should follow a defined order of entry starting with youngest birds and moving to oldest.

Rodent and wild bird control are part of perimeter biosecurity. Feed spills attract rodents, and wild birds can introduce pathogens. Maintain vegetation control around houses, keep feed storage areas clean, and check bait stations on a scheduled basis. The USDA Agricultural Research Service Animal Production and Protection program conducts research on disease prevention and control strategies relevant to these on-farm practices.

Between-Flock and Between-House Protocols

Cleaning and disinfection between flocks is the most intensive biosecurity action. The process includes dry cleaning to remove organic matter, washing with detergent, disinfecting all surfaces, and allowing adequate downtime before new birds arrive. Equipment shared between houses must be cleaned and disinfected between uses. Footwear and clothing should be house-specific or changed between houses.

Mortality and cull removal is a biosecurity risk point. Dead birds should be removed promptly and disposed of according to local regulations. The collection route should not pass through clean areas, and containers used for mortality should be cleaned and disinfected after each use.

Daily and Weekly House Management Checklist

The integrated checklist combines ventilation, lighting, and biosecurity actions into a routine that can be completed during regular house checks. Records from these checks support early problem detection and provide documentation for veterinary consultations and audits.

Daily Checks

Start each day by reviewing the previous day's records for temperature, humidity, static pressure, and mortality. Then complete the following in order:

1. Enter the house through the designated biosecurity entry, confirming footbath disinfectant is at the correct level and concentration.
2. Observe bird distribution. Birds spread evenly across the house indicate comfortable conditions. Piling indicates chilling or drafts. Birds moving away from one area indicate drafts or excessive air velocity. Birds panting or spreading wings indicates heat stress.
3. Check air quality at bird level. Ammonia odor, excessive dust, or stuffiness indicates inadequate ventilation.
4. Verify the lighting program. Confirm lights are on or off according to schedule, check that timers are functioning, and note any failed lamps.
5. Walk the full length of the house. Check water lines for leaks, feed distribution, litter condition, and evidence of wet litter or caked litter.
6. Check fans and inlets. Confirm fans are operating, shutters are opening and closing properly, and inlets are positioned according to the ventilation mode.
7. Remove and record mortality. Note any unusual patterns such as increased mortality in one zone or signs of disease.
8. Complete the daily record sheet before leaving the house.

Weekly Checks

Weekly checks address items that do not require daily attention but are essential for system reliability:

1. Clean fan blades, shutters, and inlet louvers. Dust accumulation reduces fan efficiency and airflow.
2. Check fan belt tension and condition. Loose or worn belts reduce fan speed and ventilation capacity.
3. Verify static pressure sensor calibration. Compare sensor readings to a known reference or clean and check sensor lines.
4. Measure light intensity at bird level in multiple zones. Record readings and compare to the target range for the flock age and species.
5. Clean lamps and reflectors. Dust accumulation reduces light output and creates uneven illumination.
6. Check evaporative cooling pads for clogging, mineral buildup, and proper water distribution.
7. Audit biosecurity practices. Review visitor and vehicle logs, check footbath records, and inspect rodent bait stations.
8. Review weekly records for trends in temperature, humidity, static pressure, mortality, and feed or water consumption.

Records and Measurements That Drive Decisions

Records are only useful when they are accurate, consistent, and reviewed. The goal is to detect problems early, when intervention is less costly and less disruptive to the flock.

Environmental Records

Record indoor temperature, relative humidity, and static pressure at least twice daily, or continuously if monitoring equipment is available. Outdoor temperature and weather conditions should also be recorded because they affect ventilation requirements. Fan run times and ventilation mode changes should be logged to understand how the system responds to conditions.

Research on ventilation modeling in hen houses with outdoor access has shown that outdoor access disrupts the integrity of the indoor environment, including properly planned ventilation, because pop holes behave as uncontrolled air inlets in a negative pressure ventilation system. If your house has outdoor access, record wind conditions and their effect on indoor pressure and temperature. Positive pressure ventilation has been shown to effectively mitigate disruptions to outdoor access in some configurations.

Bird Performance Records

Daily mortality and culls are the most basic health records. Track mortality by zone within the house to identify ventilation or lighting problems that affect specific areas. Feed and water consumption should be recorded daily and reviewed for trends. A sudden drop in water consumption often precedes clinical disease. Feed consumption changes can indicate temperature stress, lighting problems, or health issues.

Body weight records depend on the production system. For meat birds, weekly weight samples track growth against targets. For layers and breeders, body weight and uniformity affect subsequent performance. The FAO Animal Production and Health program provides international guidance on production recording and performance evaluation.

Ventilation Performance Records

Static pressure readings are the primary indicator of ventilation system function. A gradual increase in static pressure at the same fan settings indicates inlet blockage, dirty filters, or cooling pad deterioration. A sudden change indicates a fan failure, inlet malfunction, or wind effect. Fan rotational speed should be checked periodically because research has shown that pulley sizes and fan belt maintenance influence fan speed and therefore ventilation rates.

On-site fan testing can generate reliable data for fan ventilation characterization. If you suspect fan performance problems, measure fan speed and compare to the rated speed. Fan models that incorporate both fan rotational speeds and differential pressures considerably improve ventilation rate calculations, so record both parameters when investigating ventilation problems.

Common Failure Patterns and Troubleshooting

Recognizing common failure patterns helps you respond quickly and correctly. The following patterns are frequently observed in commercial poultry houses.

Inadequate Minimum Ventilation in Cold Weather

The house is cold and humid, litter becomes wet and caked, ammonia odor increases, and birds huddle or show respiratory signs. The cause is usually minimum ventilation rates set too low to remove moisture produced by the birds. Increase minimum ventilation gradually and monitor temperature to avoid chilling the flock. Address water leaks and drinker management because wet litter is a multidimensional problem where drinking system management and adequate shed ventilation are critical factors.

Poor Air Distribution in Tunnel Mode

Birds at one end of the house show heat stress while birds at the other end are comfortable. Temperature gradients along the house length indicate uneven airflow. Computational fluid dynamics studies have shown that variable inlet configurations can relieve high temperatures but may reduce overall ventilation efficiency or intensify temperature gradients. Evaluate inlet positions and consider whether the gradient is caused by inlet configuration, fan performance, or house design limitations.

Static Pressure Outside Normal Range

High static pressure indicates restricted airflow through inlets, dirty filters, or clogged cooling pads. Low static pressure indicates open or damaged inlets, fan problems, or building leaks. Research in large commercial layer houses found that house differential pressure can be greatly affected by strong winds in addition to fan operations and air inlet openings. When investigating pressure problems, check weather conditions first, then inspect inlets and fans.

Lighting Program Failures

Birds show increased aggression, feather pecking, or uneven feed intake. The cause may be timer failure, lamp failure, or intensity variation across the house. Check the photoperiod schedule against the target program, measure light intensity in multiple zones, and replace failed lamps promptly. Research on pullets found that maintaining similar housing conditions at different periods alleviates fear and discomfort, so avoid sudden changes in lighting conditions.

Biosecurity Breaches

Increased mortality, reduced feed intake, or clinical disease following a biosecurity breach indicates pathogen introduction. Review visitor and vehicle logs to identify potential exposure events. Increase monitoring frequency, collect diagnostic samples through your veterinarian, and reinforce biosecurity protocols with all staff. The World Organisation for Animal Health Animal Health and Welfare program provides guidance on disease notification and control measures.

Welfare Considerations in House Management

Housing conditions directly affect bird welfare, and welfare problems often indicate management problems. The USDA National Agricultural Library Animal Health and Welfare collection and the World Organisation for Animal Health Animal Health and Welfare program provide frameworks for assessing welfare in production systems.

Environmental Enrichment and Complexity

Complex environments with litter, perches, straw bales, slopes, platforms, and outdoor access stimulate chicken activity and produce good welfare effects. Research on pullets found that cage-free systems produced better physical conditions and temperaments than cage systems, and birds were more suitable for transfer to similar housing for egg laying. Improving flock uniformity in appearance and body size reduced the risk of pecking and injury, and maintaining an appropriate population reduced flock aggressiveness.

Wet Litter and Foot Health

Wet litter is a tangible welfare issue in meat chicken production because it is associated with footpad dermatitis and compromised bird performance. The critical causal factors are micro-environmental, with proper management of drinking systems and adequate shed ventilation being chief among them. Health issues such as coccidiosis and necrotic enteritis can also contribute and cannot be overlooked. When wet litter persists despite correct drinker management and ventilation, consult your veterinarian to rule out disease causes.

Fear and Stress Reduction

Lighting programs directly affect fear and stress responses. Research on broilers found that birds raised with natural light approached a novel object more quickly than birds under artificial light alone, indicating lower fear response. Species-tailored dynamic lighting programs for ducks reduced stress indicators and fear responses without compromising production. Maintaining consistent housing conditions across different periods alleviates fear and discomfort among birds.

Worker Safety and Food Safety Context

Poultry house management involves worker safety considerations that should be integrated into standard operating procedures. The FDA Animal and Veterinary resources cover regulatory aspects of animal health products, and the USDA Agricultural Research Service Animal Production and Protection program conducts research relevant to production safety.

Worker Safety in Ventilation and Lighting Systems

Electrical safety is critical when working with ventilation fans, lighting systems, and monitoring equipment. Lock out electrical circuits before cleaning fans or replacing lamps. Fans with exposed belts and pulleys present entanglement hazards. Cooling pad systems involve water and electrical components that require careful maintenance procedures.

Air quality in poultry houses affects worker health as well as bird health. Ammonia, dust, and bioaerosols can cause respiratory irritation in workers. Modeling of bio-aerosol concentration in commercial poultry houses has been studied to understand exposure patterns. When working in houses with poor air quality, use appropriate respiratory protection and increase ventilation before entering.

Food Safety Integration

Biosecurity practices that prevent pathogen introduction to the flock also protect food safety by reducing the risk of foodborne pathogen contamination of meat and eggs. Cleaning and disinfection between flocks, rodent control, and wild bird exclusion all contribute to food safety. The FDA Animal and Veterinary resources provide information on food safety regulations relevant to poultry production.

Limitations and Professional Escalation Criteria

House management practices have limitations that should be recognized. Ventilation models and computational fluid dynamics simulations are valuable tools, but they require validation against real-world conditions. Research on ventilation modeling in hen houses with outdoor access found that simulations predicted airflow velocity with errors under 50 percent for three of four scenarios and predicted temperature with errors under 6 percent for all scenarios. These results are useful for system design and improvement but do not replace on-farm measurement.

When to Consult a Veterinarian

Escalate to your veterinarian when you observe any of the following:

1. Mortality exceeding expected levels for the flock age and production system, especially if mortality increases suddenly or is concentrated in one zone.
2. Clinical signs of disease including respiratory distress, diarrhea, neurological signs, or sudden drops in feed or water consumption.
3. Persistent wet litter that does not respond to drinker management and ventilation adjustments.
4. Behavioral changes including increased aggression, feather pecking, or abnormal vocalization that persist despite lighting and environmental adjustments.
5. Any suspicion of a notifiable disease. The World Organisation for Animal Health Animal Health and Welfare program provides information on disease reporting obligations.

When to Consult an Engineer or Ventilation Specialist

Escalate to a ventilation specialist when:

1. Static pressure readings are consistently outside the normal operating range despite inlet and fan maintenance.
2. Temperature gradients along the house exceed acceptable limits in tunnel mode.
3. Fan performance has degraded and on-site testing indicates airflow below expected levels.
4. You are planning major system changes such as converting from curtain-sided to closed housing, adding evaporative cooling, or installing alternative HVAC systems.

Research on alternative HVAC systems has shown that environmental impact reduction potential varies with climatic regions and electricity grid mix sources. A specialist can evaluate your specific conditions and recommend appropriate system configurations.

When to Consult a Lighting Specialist

Escalate to a lighting specialist when:

1. You are designing a lighting program for a new house or a different species.
2. Behavioral problems persist despite correct photoperiod and intensity.
3. You are considering natural light provision through windows and need guidance on integration with artificial lighting.

Research on light modulation has shown that variations in light wavelength, intensity, and duration significantly regulate feed intake, stress physiology, immune competence, and overall flock health. Species-specific programs may require specialized knowledge to implement correctly.

Frequently Asked Questions

How do I know if my minimum ventilation rate is correct?

The correct minimum ventilation rate keeps litter dry, ammonia below detectable odor at bird level, and carbon dioxide within acceptable limits while maintaining target temperature. If litter becomes wet or ammonia odor is present, increase minimum ventilation. If birds are chilled or heating costs are excessive, evaluate whether moisture sources such as water leaks are contributing before reducing ventilation.

What static pressure should my house maintain?

The target static pressure depends on your house design, inlet type, and ventilation mode. Research in large commercial layer houses found that pressure remained between negative 10 and negative 30 pascals for about three quarters of operating time, but strong winds could shift pressure dramatically. Your ventilation system designer or specialist can provide the target range for your specific house. Consistent readings outside that range indicate a problem.

How often should I clean fan blades and shutters?

Fan blades and shutters should be cleaned at least weekly, and more frequently in dusty conditions or during periods of high ventilation demand. Dust accumulation reduces fan efficiency and airflow. Research has shown that fan rotational speeds are influenced by pulley sizes and fan belt maintenance, so include belt inspection in the same maintenance routine.

What light intensity should I use for my flock?

Light intensity depends on species, age, and production goals. Research on pullets found that 5 to 30 lux achieved a welfare-performance balance, with the caveat that this varies by age, strain, and activities. Measure intensity at bird level in multiple zones because dust accumulation on lamps and reflectors reduces output unevenly. Your lighting program should specify intensity targets for each production phase.

Can I use natural light in my broiler house?

Research comparing natural light provided through windows supplemented with LED against artificial light alone found that birds with natural light approached a novel object more quickly, indicating lower fear response, and showed lower footpad dermatitis scores. However, natural light provision did not significantly improve other welfare parameters measured. If you add windows, you must manage the interaction between natural and artificial light to maintain consistent photoperiod control.

How do ventilation and biosecurity interact?

Ventilation moves air through the house and can distribute pathogens within and between houses if biosecurity is inadequate. Negative pressure ventilation draws air through inlets, and any uncontrolled openings such as damaged curtains or improperly sealed outdoor access can allow unfiltered air entry. Biosecurity practices such as maintaining house integrity, controlling wild bird access, and cleaning between flocks reduce the risk that ventilation systems spread pathogens.

What records should I keep for ventilation management?

Record indoor temperature, relative humidity, static pressure, fan run times, and ventilation mode at least twice daily. Record outdoor temperature and weather conditions. Track mortality by zone, feed and water consumption, and any equipment maintenance or repairs. Review these records weekly to identify trends before they become problems.

When should I call a veterinarian about house management issues?

Call your veterinarian when mortality exceeds expected levels, clinical signs of disease appear, wet litter persists despite correct drinker and ventilation management, or behavioral problems continue despite lighting and environmental adjustments. Early veterinary involvement reduces the cost and impact of disease outbreaks. The World Organisation for Animal Health Animal Health and Welfare program provides information on disease prevention and control.

Related Farming Guides

• Poultry Energy Management: Lighting, Ventilation, and Heating Efficiency
• Poultry Farm Biosecurity Checklist
• Beef Herd Biosecurity Plan
• Broiler House Ventilation Fundamentals
• Sheep Farm Biosecurity Plan

References and Further Reading

• FAO Animal Production and Health. Food and Agriculture Organization of the United Nations.
• Animal Health and Welfare. USDA National Agricultural Library.
• Animal and Veterinary Resources. U.S. Food and Drug Administration.
• Animal Health and Welfare. World Organisation for Animal Health.
• Animal Production and Protection. USDA Agricultural Research Service.
• Towards modelling, and analysis of differential pressure and air velocity in a mechanical ventilation poultry house: Application for hot climates.. Heliyon, 2023.
• Effects of Key Farm Management Practices on Pullets Welfare-A Review.. Animals : an open access journal from MDPI, 2022.
• Measuring and Modeling Mechanical Ventilation for Long-Term Environmental Monitoring in Large Commercial Laying Hen House.. Animals : an open access journal from MDPI, 2024.
• Ventilation Modeling of a Hen House with Outdoor Access.. Animals : an open access journal from MDPI, 2025.
• Restraint and housing of ratites.. The Veterinary clinics of North America. Food animal practice, 1998.
• Setting research driven duck-welfare standards: a systematic review of Pekin duck welfare research.. Poultry science, 2022.
• The multidimensional causal factors of 'wet litter' in chicken-meat production.. The Science of the total environment, 2016.
• CFD Simulation of Dynamic Temperature Variations Induced by Tunnel Ventilation in a Broiler House.. Animals : an open access journal from MDPI, 2024.
• The Effect of Duck Targeted Lighting Programs on Productivity, Health, and Welfare.. 2026.
• PIO, A Large-Scale Dataset for Broiler Chicken Detection under Real Poultry Farming Conditions.. 2026.
• Physiological role of light modulation on poultry production, reproductions and welfare: a-systematic review.. 2026.
• Photoperiod as a neuroendocrine regulator: A review on pineal-melatonin signaling and physiological plasticity in poultry.. 2026.
• Evaluating the impact of natural and artificial light treatments on fear response and welfare parameters in commercial broilers.. 2026.
• A dual-modal vision system for non-invasive real-time monitoring of broiler diarrhea under low-light conditions.. 2026.
• Lightweight multiscale behavior recognition for caged laying hens using an enhanced YOLOv8 framework.. 2026.
• Explainable YOLO architectures for egg size measurement and classification.. 2026.
• Determination of rational algorithms for microclimate control in poultry house for winter period. Poultry and Chicken Products, 2025.
• Comparative life cycle assessment of alternative heating, ventilation and air-conditioning (HVAC) systems for poultry houses.. Journal of Environmental Management, 2025.
• Respiration in relation to poultry house ventilation.. Poultry Science, 1980.
• Improving poultry system in close house cage through advanced HVAC design: A Review of evaporative cooling pads and energy efficiency in broiler cages. Mechanical Engineering for Society and Industry, 2024.
• Low-Carbon Environmental Control in Intensive Duck Houses: Envelope, Ventilation, Heat Pumps, and Moisture Management. Agriculture, 2026.
• Evaluating the intermittent ventilation of summer poultry house in Northwest China. Nongye Gongcheng Xuebao Transactions of the Chinese Society of Agricultural Engineering, 2024.
• A review of current research and development for mechanical ventilation systems in poultry houses. Energy and Buildings, 2026.
• Modelling bio-aerosol concentration in commercial poultry houses. 2017 Asabe Annual International Meeting, 2017.
• Effect of ventilation on distributions, concentrations, and emissions of air pollutants in a manure-belt layer house. Journal of Applied Poultry Research, 2014.

This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.