Horse trailer design significantly affects welfare during transport through space provision, ventilation, flooring, and loading design that determine injury risk and physiological stress levels.
Horse transport welfare depends on the interaction between trailer design, journey management, and individual horse preparation. Well-designed trailers with adequate space, appropriate ventilation, non-slip flooring, and loading equipment that reduces stress create the physical conditions for welfare-positive transport. However, even excellent trailer design cannot compensate for poor loading training that causes fear and injury. Journey planning including appropriate rest stops, water provision, and temperature management are equally important welfare determinants. Horse welfare during transport is a system-level outcome determined by multiple interacting factors requiring attention at all points.