Adequate clean drinking water is a fundamental welfare requirement for pigs. Water deprivation or restricted access causes significant distress and compromises health in commercial pig production.
Access to clean, adequate drinking water is one of the most fundamental welfare requirements for pigs. Water deprivation — even partial — causes rapid onset of distress, increased aggression as animals compete at drinkers, and physiological stress. In commercial systems reliant on nipple drinkers, malfunctions can go undetected, leaving pigs without water for extended periods. Stocking density affects access, with subordinate animals often unable to reach drinkers. Lactating sows have particularly high water demands and restrictions cause acute welfare harms. Water quality matters too — high salt or mineral content reduces voluntary intake. Regular drinker checks, appropriate drinker-to-pig ratios, and temperature-appropriate water provision are basic requirements that should be enforced in all commercial systems.