Animal welfare science has developed rigorous methods for measuring suffering and wellbeing. Understanding these methods helps evaluate welfare claims critically and support evidence-based progress.
Animal welfare science has transformed the field from subjective observation to rigorous, reproducible measurement. Physiological measures including cortisol, heart rate variability and immune markers quantify stress responses. Behavioural measures including stereotypy frequency, play behaviour and preference testing reveal the quality of subjective experience. The shift from measuring absence of negative states to presence of positive experiences — following the Five Domains model — has enriched welfare assessment. Evidence from welfare science should be the foundation for farm assurance standards, pet care guidance and wildlife management decisions rather than tradition or commercial convenience.