Dehydration during livestock transport causes significant suffering and health problems. Ensuring adequate water access during journeys is a fundamental but frequently violated welfare requirement.
Water deprivation during transport is one of the clearest and most preventable welfare failures in the livestock sector. The physiological consequences of dehydration are well-documented: above 4-6% body weight loss from water deficit, animals experience reduced cognitive function and increased stress; above 8%, clinical illness and immunosuppression; above 12%, risk of death. Transport stress, vehicle vibration, unfamiliar environments and often high temperatures dramatically increase water needs above resting baselines. Yet regulatory requirements for water access are routinely unmet: vehicle drinkers malfunction, animals unfamiliar with nipple drinker systems do not use them even when present, and enforcement of welfare regulations at departure, en route and at destination is inadequate in most jurisdictions. The solutions are known: pre-transport watering, appropriately designed and tested vehicle drinker systems, mandatory rest stops with confirmed water access, and meaningful enforcement with penalties that make compliance economically rational.