Farm animals that are gradually exposed to potentially stressful procedures develop greater resilience and reduced stress responses. Understanding stress habituation has important welfare and practical implications.
Stress habituation research demonstrates that many welfare problems in farm settings stem from animals encountering necessary procedures as unfamiliar and therefore threatening events. Cattle loaded onto trailers for the first time experience extreme fear that is largely preventable through gradual exposure. Pigs encountering CO2 stunning chambers for the first time show panic responses that would be reduced by prior training. The welfare implications are substantial: animals undergoing veterinary treatments, transport or slaughter with prior habituation experience significantly lower peak stress. Critically, habituation must be through positive or neutral exposure - negative experiences cause sensitization rather than habituation, increasing stress responses over time. This distinction underscores the importance of training stockpeople in gentle handling techniques.