Farm factors
* Housing system
* Aisles and doorways
On-farm Management
* Health status of the birds
* Litter removal
* Birds collected in 1 section of the house
* Catching methods
Transport
* System
* Type of doors
* Number of birds/crate
* Climate control on the truck
* Vibrations
* Duration of the journey
* Facilities (access to water/feed)
* Climate during transport
At the slaughter plant
* Post transport handling and environment
* Shackling and stunning