The science of animal welfare has advanced enormously in recent decades, developing validated tools to measure suffering, positive emotions, and overall quality of life in animals.
Early welfare science focused primarily on eliminating negative states — hunger, disease, fear. Contemporary welfare science seeks to promote positive experiences and a good life worth living. This shift has profound implications for how we design housing, management, and enrichment for animals across all contexts. Validated assessment tools allow welfare to be measured, compared, and improved systematically.