Chick Comfort: How to Keep Broiler Chicks Stress-Free During Transport
"New research reveals insights into maintaining optimal microclimate conditions during chick transport, reducing stress and improving welfare for better performance."
Transporting day-old broiler chicks can be a stressful experience, impacting their welfare and subsequent production performance. Factors like thermal stress and inadequate air circulation during transport can lead to economic losses for poultry farmers. Therefore, maintaining an optimal microclimate during this crucial phase is essential.
The ideal microclimate for day-old chicks considers both the container environment and the conditions inside the chick boxes. While recommended container temperatures range between 22 and 31°C with 50% relative humidity, the chick boxes themselves ideally require temperatures of 32–35°C and 50–60% relative humidity. Understanding this thermal gradient is key to minimizing chick stress.
Recent research leverages artificial neural networks (ANN) to assess and predict the impact of transport microclimates on chick surface temperature, offering a promising tool for optimizing transport conditions and improving chick welfare.
Transport Risks and Measured Impacts
The European Food Safety Authority analyzed peer-reviewed and grey literature alongside animal-movement statistics from the EU’s TRACES database to assess current practices for transporting day-old chicks. EFSA reports that welfare consequences vary with the transport stage, means, and duration. Poor transportation and prolonged holding can lead to dehydration, increased mortality, and stunted growth, while research on post-hatch transport has examined effects on chick quality, welfare, and productivity through slaughter.
Established Handling Practices
Standard chick-transport practice depends on controlling the factors that affect chick quality and growth performance after hatch. Poor transportation and prolonged holding are specifically associated with dehydration, increased mortality, and stunted growth. Broader poultry-handling guidance also recognizes that catching, carrying, crating, and loading can cause stress; a 2025 study compared inverted manual, upright manual, and mechanical catching methods using welfare, ergonomic, and economic criteria.
An Evolving Welfare Focus
Understanding of chick transport has developed from treating movement as a logistical step to examining its effects on welfare, health, and later productivity. Earlier and continuing work has increasingly emphasized environmental conditions, handling, and holding time as factors that can shape outcomes. The historical record therefore supports a cautious view: transport methods should be evaluated not only for delivery efficiency but also for their consequences for newly hatched chicks.
Optimizing Chick Transport: What the Research Shows?
A study conducted in São Paulo, Brazil, monitored nine shipments of broiler chicks, assessing the microclimate within the transport truck and its impact on the chicks' surface temperature. Researchers used an air-conditioned truck with an average capacity of 380 boxes, selecting fourteen chick boxes per shipment to monitor five chicks per box. The mean surface temperature of chicks (MST) was measured using an infrared thermometer at loading and unloading. Air temperature (T), relative humidity (RH), and specific enthalpy (h) were recorded using seventeen data loggers.
- Tcont: Air temperature inside the transport container.
- Tbox: Air temperature inside the chick boxes.
- RHcont: Relative humidity inside the transport container.
- RHbox: Relative humidity inside the chick boxes.
- MSTshipment: Mean surface temperature of chicks during shipment.
- MSTload: Mean surface temperature of chicks during loading.
- MSTunload: Mean surface temperature of chicks during unloading.
Current Research Directions
Recent research continues to examine how transport conditions affect chick welfare and performance. Studies in this area assess factors such as handling, environmental control, transport duration, and holding conditions rather than treating transport as a single uniform exposure. The available material supports a practical research direction focused on identifying conditions that preserve chick health and productivity.
Where Transport Fails
Transport cannot be considered welfare-safe simply because chicks reach their destination. A review identifies thermal challenges, including both elevated thermal loads and cold stress, as major threats to welfare and survival. Research under commercial conditions is intended to establish evidence-based management strategies and critical limits that reduce welfare losses and help maintain meat quality, while other work stresses the need to examine where the process restricts chicks’ freedoms.
Transport Compared with In-House Hatching
A 2024 PLOS ONE study compared in-house hatching with other treatments and hypothesized that reducing feed and water deprivation, while removing hatchery processing and transport, would improve health, welfare, and performance outcomes. This comparison frames transport as one component of a broader chain of hatchery-related exposures rather than an isolated event. Separately, the company JAS reports training airline and freight-forwarding professionals in the specific handling and care needs of day-old chicks transported around the world.
Key Takeaways for Healthier Chicks
The study highlights the importance of maintaining optimal microclimate conditions during chick transport to minimize stress and improve welfare. By monitoring and adjusting temperature and humidity, poultry farmers can significantly impact the health and performance of their flocks.
Evidence-Based Transport Priorities
Research on broiler chicks in Spain assessed transport conditions that may affect welfare and performance, reflecting the need to connect environmental conditions with biological outcomes. A 2025 University of Saskatchewan study of Leghorn chicks likewise reported evidence-based data for hatchery and transport practices intended to support development, reduce stress, and enhance welfare. Together, these sources point toward coordinated hatchery and transport decisions rather than treating chick comfort as a single handling intervention.
Toward More Predictive Care
Future work may focus on turning transport research into more precise, evidence-based operating limits for temperature, holding, handling, and journey conditions. Progress is likely to depend on linking welfare measurements with later health and performance outcomes. These directions remain prospective, but they offer a way to improve chick comfort without relying solely on broad transport rules.
System-Wide Welfare Risks
Day-old chick transport can involve trucks or planes and can occur at commercial or specialty scales. The available welfare report warns that, unless carefully controlled and properly managed, substandard environmental conditions may harm chicks or result in death. Systemic challenges also begin before transport: a case study of one large conventional US hatchery identified 17 severe welfare problems affecting chicks and chick embryos.
People and Logistics Matter
JAS describes a collaborative case study with Aviagen in which custom holding rooms with environmental controls were designed to improve chick welfare during transit. The example shows that transport outcomes depend on practical logistics as well as the birds’ biological needs. It also illustrates how infrastructure and coordinated handling can be used to address welfare risks during movement.
The research underscores the value of using data-driven tools like artificial neural networks to predict and manage thermal stress in broiler chicks during transport. Implementing these technologies can lead to more efficient and humane practices.
Future research and improvements in truck acclimatization systems can further enhance chick comfort during transport. Standardization of load densities and optimization of airflow within containers are key areas for future development, resulting in reduced losses and improved welfare outcomes.