Positive welfare science for laying hens identifies and promotes indicators of good emotional states, moving beyond disease prevention to actively measuring and improving hen quality of life.
Positive welfare science for laying hens recognises that preventing the worst suffering is not sufficient for good welfare — hens can be free of obvious injury and disease while living in states of chronic low-level frustration and boredom. Dustbathing is the paradigm case of a positive welfare behaviour: hens show clear anticipatory behaviour before dustbathing, engage in it enthusiastically when loose substrate is available, and show neurological reward signals during the act. Systems that provide loose substrate — even a substrate tray in otherwise enriched colony cages — measurably improve welfare beyond injury prevention alone. Cognitive bias testing, while impractical for routine farm assessment, validates the welfare value of enriched conditions: hens from enriched environments show more optimistic responses to ambiguous cues in controlled experiments. Commercial-scale positive welfare assessment using trained observer QBA and dustbathing frequency counts is increasingly integrated into progressive assurance programmes, allowing farms to track improvement over time rather than just compliance with minimum rules.