Ducks have strong motivational needs for water immersion that most commercial production systems fail to provide. Understanding these needs is central to improving farmed duck welfare.
Duck welfare illustrates a fundamental tension in intensive farming: the commercial pressure to reduce costs by simplifying production systems directly conflicts with the evolved behavioural needs of the animals involved. Ducks evolved as semi-aquatic birds with motivational systems powerfully oriented toward water — for foraging, bathing, preening, social display, and eye care. Denying water access is not merely a deprivation of preference but a frustration of highly motivated behaviours linked to physical health and psychological wellbeing. Ducks without eye-flushing water access develop conjunctivitis and nasal blockages at significantly higher rates. Studies using consumer demand methodology confirm that ducks will work hard to access open water, demonstrating the strength of the motivation. The barrier to improvement is cost — open water systems require more management and create effluent challenges — but the welfare case for requiring water access as a minimum standard is scientifically robust.