Livestock hide pain as an evolutionary survival strategy, making its recognition challenging. Validated pain scoring tools enable earlier detection and treatment, significantly reducing the duration of animal suffering.
Pain recognition is the gateway to pain treatment, and treatment is the prerequisite for welfare improvement. Livestock evolved to hide pain as a predator avoidance strategy — an animal that shows weakness is targeted. This evolutionary legacy means that visible pain indicators in farm animals often represent severe, prolonged suffering that has exceeded the animal's capacity for concealment. Validated pain scoring tools bypass this problem by identifying subtle facial and postural changes that precede obvious clinical signs. Training all farm personnel to use these tools systematically converts pain recognition from an expert skill to a routine farm practice. The welfare returns from this investment are substantial and rapid.