Foot rot (interdigital necrobacillosis) is a rapidly progressing bacterial infection causing severe lameness in cattle that requires prompt antibiotic treatment to prevent tissue destruction and chronic welfare harm.
Foot rot causes severe acute pain that is among the most obvious welfare indicators in cattle medicine. Affected cattle are typically non-weight-bearing on the affected limb, showing a characteristic hopping gait or complete avoidance of ground contact. The interdigital swelling is visually striking, and palpation elicits strong withdrawal responses indicating significant pain. The rapid progression from initial infection to severe lameness within 24-48 hours means that daily welfare monitoring — at minimum — is required to detect cases before they become complicated. Early antibiotic treatment is highly effective and rapidly welfare-improving: most cattle show significant improvement in weight-bearing within 48-72 hours of appropriate therapy. The progression to joint infection when treatment is delayed represents a welfare escalation that creates permanent damage — affected joints cannot recover, and repeated treatment failure leads to euthanasia as the welfare-appropriate endpoint. Prevention through footbath use and pasture management reduces incidence but does not eliminate disease in high-risk environments.