Hoof abscess and laminitis are both common causes of sudden-onset severe lameness in horses, and distinguishing between them is critical because they require different management approaches.
Both conditions cause significant acute pain, but the welfare trajectory is very different: hoof abscess is usually self-limiting and resolves with appropriate management, while laminitis can progress to chronic, severe, and permanently debilitating disease if not treated promptly and correctly. Misdiagnosis is a welfare concern in both directions: treating laminitis as an abscess delays essential dietary management and rest, allowing the condition to progress; treating an abscess as laminitis may involve unnecessary restriction and medication. Horses with laminitis sometimes show initial improvement with painkillers, masking progression of internal hoof damage (coffin bone rotation and sinking) that will only become apparent weeks later. The welfare stakes of laminitis mean rapid, accurate assessment is urgent - every hour of continued inappropriate feeding or management in a laminitic horse risks additional permanent damage.