Measuring positive emotional states in pigs through validated behavioral and physiological indicators is transforming welfare assessment beyond simple absence-of-suffering metrics.
Positive affect measurement in pigs represents the cutting edge of farm animal welfare science. Moving beyond merely counting injuries and abnormal behaviors, positive welfare assessment asks what good experiences pigs are actually having. The validation of specific behavioral indicators — particular tail positions, ear orientations, vocalization acoustics, and cognitive bias patterns — provides practical tools that farmers can use for on-farm welfare monitoring. The technology now exists to automate vocalization monitoring to provide continuous real-time welfare feedback from pig facilities. Farms that achieve high positive welfare indicator scores alongside low negative indicator scores represent genuinely excellent welfare environments. Certification programs adopting positive welfare metrics drive farming toward this higher standard.