Every year, billions of chickens, turkeys, ducks, and other poultry are transported to slaughter. The transport journey — from catching and loading through transit to lairage and unloading — represents one of the most stressful and injurious experiences in the lives of farmed birds. Despite being brief (often under 4 hours), transport mortality in poultry can exceed that of many other farmed species. Understanding and improving poultry transport welfare is a major priority for welfare scientists and advocates in 2025.
70B+
chickens slaughtered annually worldwide
0.2-1%
typical transport mortality (broilers)
140M+
birds die in transport annually (estimate)
4h
typical maximum EU transport duration
Why Poultry Transport Is Uniquely Challenging
Poultry transport presents welfare challenges that differ significantly from cattle or pig transport:
Volume and speed: Catching and loading operations involve tens of thousands of birds per cycle, with high speed creating risk of rough handling
Physiological vulnerability: Modern fast-growing broiler breeds are already at the edge of their physiological capacity — transport stress can rapidly tip borderline birds into cardiovascular failure
Temperature regulation: Birds cannot sweat and must thermoregulate through panting; overcrowded containers in warm weather rapidly become heat-stress zones
Catching trauma: Manual catching involves humans grabbing birds by legs and throwing them into crates; the risk of fractures, dislocations, and hemorrhaging is significant
Unfamiliarity and fear: Birds raised in low-light indoor sheds experience intense fear responses to the bright lights, human contact, and novel stimuli of catching operations
The Transport Journey: Stage-by-Stage Welfare Issues
Stage 1: Catching and Loading
Manual catching is still the dominant method worldwide. A trained catcher can catch and crate 1,500-2,000 birds per hour, requiring them to grab birds quickly and efficiently. Common welfare problems include:
Wing fractures from grabbing birds by a single wing
Leg fractures and dislocations from rough handling
Internal hemorrhaging from compression injuries
Severe fear responses measurable by corticosterone spikes
Mechanical harvesting using automated catching machines has been shown in some studies to reduce injury rates compared to manual catching when properly calibrated, but can cause different types of injury (bruising from conveyor contact). Adoption of mechanical harvesting varies widely by country and operation size.
Stage 2: Transport Containers and Loading Density
Poultry are typically transported in multi-deck crates on open-sided vehicles. Container loading density significantly affects welfare:
EU regulations specify maximum stocking densities for transport, but compliance monitoring is limited
Overcrowded crates prevent normal posture, increase competition for space, and raise thermal load
Birds at the center of dense crates may be unable to reach air movement and overheat
Dead-on-arrival (DOA) rates correlate strongly with density and temperature during transit
Stage 3: Journey Conditions
Temperature management is the dominant welfare determinant during transit. Birds are vulnerable to:
Heat stress (>30°C within crates) causing mortality in minutes in extreme cases
Cold stress in winter, particularly for wet or sick birds and in northern European climates
Ammonia buildup in poorly ventilated crates
Journey duration: While EU regulations cap poultry transport at 12 hours maximum (with 4 hours as a practical guideline for commercial operations), enforcement varies. In non-EU countries, journey duration is often unregulated, and birds may travel 24+ hours without water or rest.
Stage 4: Lairage and Pre-Slaughter Holding
If birds arrive before slaughter lines are ready, they may wait in lairage — holding areas at the slaughterhouse. Lairage welfare depends on temperature control, wait time, and whether water is provided (rarely provided to poultry in lairage). Extended lairage significantly increases DOA rates. Overnight holding, sometimes necessary for scheduling reasons, is a significant welfare concern.
Transport Mortality: The Data
Species
Typical DOA Rate
Global Annual Estimate
Broiler chickens
0.2-1.0%
100-400 million birds
Laying hens (end-of-lay)
0.5-2.0%
10-40 million birds
Turkeys
0.1-0.5%
5-15 million birds
Ducks
0.2-0.8%
15-50 million birds
These figures, while representing small percentages, translate into staggering absolute numbers given the scale of global poultry production. Moreover, mortality figures exclude the far larger number of birds that arrive injured, distressed, or debilitated — what the industry terms "dead-on-arrival plus compromised" birds.
Special Case: End-of-Lay Hen Transport
End-of-lay hens: the forgotten welfare issue
When laying hens complete their productive lives (typically 12-18 months), they are transported to processing plants. End-of-lay hens typically have higher transport mortality than broilers because: they are older and physically depleted from egg production; they often have significant bone density loss (osteoporosis is near-universal in laying hens); catching and transport cause fractures easily in these fragile birds; and they may be in poor condition from late-lay stressors. Transport mortality rates for end-of-lay hens of 1-3% are not uncommon — significantly higher than broiler transport mortality. This population receives less welfare attention than broilers despite its vulnerability.
Current Regulations
Jurisdiction
Max Journey Time
Temperature Requirements
Density Requirements
European Union
12h (commercial 4h typical)
Yes (general)
Yes (species-specific)
United Kingdom
12h (post-Brexit)
Yes
Yes
United States
No federal limit
Limited
Limited
Australia
State-by-state
Limited
Limited
China
Not regulated
Not regulated
Not regulated
Brazil
No specific limit
Limited
Limited
Innovations and Solutions
Controlled atmosphere stunning (CAS) at catching
Some slaughter systems are exploring on-farm or near-farm stunning using controlled atmosphere (CO2 or inert gas mixtures) before transport. This approach would render birds unconscious before the stressful catching and transport experience, eliminating transport welfare concerns entirely. It requires significant infrastructure investment but represents a fundamental welfare improvement.
Mobile slaughter units
Mobile slaughter units that come to the farm eliminate transport entirely. While economically challenging at industrial scales, they have been successfully implemented for small flocks and specialty poultry markets. They represent the clearest welfare solution to transport stress.
Mechanical catching improvements
Modern automated catching machines can match or exceed manual catching welfare outcomes when calibrated for bird size and properly maintained. Their adoption reduces the variability in catching quality introduced by human catcher skill and fatigue.
Data-driven transport management
Real-time temperature and humidity monitoring in transport vehicles allows drivers to adjust ventilation and routing based on actual conditions rather than schedules. Early adoption has shown DOA reductions of 20-40% in pilot studies.
Corporate and NGO Commitments
Several major poultry companies and retailers have made transport welfare commitments in 2025:
Maximum transport journey time commitments (typically 4-6 hours within EU)
Mechanical catching adoption targets
DOA rate tracking and public reporting
Driver welfare training requirements
NGOs including Compassion in World Farming, Humane Society International, and the RSPCA have active campaigns targeting transport welfare improvements in poultry supply chains.
Outlook
The EU is expected to revise its animal transport regulation (EC 1/2005) in 2025-2026, with stronger provisions for poultry likely. The UK is separately reviewing its post-Brexit transport standards. Key areas for improvement include: mandatory maximum temperatures, enhanced crate space requirements, and new requirements for poultry transport spanning more than 4 hours. Corporate supply chain commitments are moving faster than regulation in many cases.