“Assessment Of Welfare And Journey Risk Factors Affecting Welfare”
This study was published in the Canadian Journal of Animal Science. The findings of injury to horses are hardly surprising considering the number of unfamiliar horses travelling together in close confines and the rough handling involved whenever animals are being transported to slaughter.
“Injuries in horses transported to slaughter in Canada. Can. J. Anim. Sci. 95: 523–531. Horses transported in groups on long journeys to slaughter are at risk of injury. Injuries can occur following trauma and aggression from other horses. This study quantified injuries in 3940 horses from 150 loads that arrived at a slaughter plant in Canada. Surface injuries were quantified using visual assessment. Digital thermography was used to detect areas of raised surface temperature. Carcasses were assessed for bruising. Multivariable regression analysis was used to examine the associations between journey characteristics and the risk of injury. There was a significant association between journey duration and the number of horses per load with surface injuries (P<0.001). In 100 horses from 40 loads studied in detail, 33% had surface injuries identified by visual assessment, 48% had areas of raised surface temperature identified by thermography and 72% had bruising identified by carcass assessment. The levels of agreement between identification of injury by thermography and that by identification of visible injuries and carcass bruising were low. Pre-transport assessments could not be performed and hence injuries could not be linked causally to the transport conditions alone. However, the detailed assessments of injury and the use of multivariable regression analysis showed that long journeys were associated with injuries.”
The full text of the study, available here, makes several interesting observations:
“On the basis of changes in the behaviour and physiology of horses during a 30-h journey, Friend (2000) considered that journey durations in hot conditions, without water, should not exceed 28 h and they should be shorter if there was aggression between horses, the stocking density was high, and the fitness of the horses was less than ideal.” This suggests that the 36 hour transport limitation is inhumane.