Understanding the physiological basis of stress in cattle provides the scientific foundation for welfare assessment and improvement, moving beyond subjective observation to objective measurement.
Moving from subjective welfare judgments to objective physiological measurement enables more rigorous welfare assessment and improvement tracking. Cortisol measurement shows that handling, transport, and housing transitions cause measurable physiological stress. Cognitive bias testing reveals that cattle in poor welfare conditions have pessimistic expectations. These tools allow welfare interventions to be evaluated objectively rather than relying on assumed outcomes.