Water is the most essential nutrient for pigs, yet inadequate provision is widespread in intensive systems. Understanding water requirements and welfare consequences helps identify and address this preventable problem.
Water restriction is one of the most frequently overlooked welfare problems in pig production. Inadequate drinker numbers relative to pig numbers mean that subordinate animals queue for extended periods without drinking, experiencing genuine thirst. Nipple drinkers with insufficient flow rates restrict intake even when queuing time is adequate. Pigs with restricted water intake are uncomfortable, frustrated, and in prolonged thirst, which constitutes a basic welfare failure. The welfare and productivity costs of water restriction are well-documented — and fixable. Ensuring adequate drinker numbers (minimum one per 10 pigs for nipple drinkers), appropriate flow rates, and regular maintenance to prevent blockage are low-cost, high-impact welfare improvements accessible to all producers.