Behavior on the Truck
Behavior was recorded on each vehicle using still image digital cameras (Pentax Optio W30 7.1 megapixel; Mississauga, ON, Canada) located in the 8 experimental
compartments of the PB and in all 4 compartments of the DD, and images were recorded at 1-min intervals. The percentage of pigs within the field of view standing,
sitting, or lying was recorded from these images as the truck was waiting at the farm once the truck was fully loaded (approximately 5 min before departure) and on
arrival at the abattoir. During transit, the percentage of pigs standing, sitting, or lying was recorded from these images at 5-min intervals. On occasions where the camera view was occluded during an observation, the previous image was observed.