Pain recognition in farm animals has improved dramatically, revealing widespread undertreated pain. Systematic pain management is both a welfare obligation and an economic opportunity for farm profitability.
Farm animal pain recognition has undergone a revolution as scientists developed validated assessment tools based on facial grimace and behavioral indicators. Before these tools, the inadequate detection of pain was a major barrier to treatment — invisible pain is undertreated pain. Grimace scale-validated pain scoring for cattle, sheep, pigs, and horses provides objective, trainable pain assessment methods that farmers and veterinarians can use systematically. The next challenge is translating recognition into treatment: analgesic access, cost, and cultural norms all affect whether detected pain receives appropriate medication. The welfare argument for systematic pain management is straightforward; the economic argument is strengthening as evidence accumulates that pain compromises production performance across species.