Equine Arthritis: Welfare Management Guide

Arthritis and Equine Welfare

Osteoarthritis (OA) is one of the most prevalent and welfare-significant conditions in horses, affecting an estimated 60% of equine lameness presentations. Chronic joint pain significantly reduces quality of life and limits the horse's ability to perform natural behaviours. Appropriate management can maintain good welfare for extended periods.

Common Joint Sites Affected

• Pastern (coffin and pastern joints): 'Ringbone' — high and low ringbone affect movement and cause significant pain
• Navicular syndrome: Degenerative condition of the navicular bone and associated structures in the foot — common cause of forelimb lameness
• Hock (tarsocrural and distal intertarsal joints): 'Bone spavin' — particularly common in older horses and those worked in collection
• Fetlock joint: OA common in performance and older horses; significant lameness and welfare concern
• Stifle: Complex joint susceptible to OA particularly following injury or congenital conditions

Welfare Assessment

• Pain scoring: Equine Pain Scale, Horse Grimace Scale for objective pain assessment
• Gait analysis: Inertial sensors and subjective lameness grading (0-5 AAEP scale)
• Behavioural indicators: Reduced movement, reluctance to turn, stiffness when rising, irritability during grooming or saddling
• Quality of life: Observation of time at rest, social interaction, interest in environment

Management Strategies

• NSAIDs: Phenylbutazone ('bute'), meloxicam, and firocoxib — cornerstone of medical management; lowest effective dose for welfare and safety
• Joint injections: Intra-articular corticosteroids (methylprednisolone, triamcinolone) ± hyaluronic acid; reduces inflammation; may require repeated treatment
• Nutraceuticals: Glucosamine, chondroitin, MSM — limited evidence but used widely; may have mild supportive effects
• Physiotherapy: Controlled exercise, hydrotherapy, and physiotherapy maintain muscle support and joint health
• Farriery: Appropriate shoe and trim selection significantly affects loading and comfort in foot OA; specialist farriery for navicular and ringbone cases
• Regenerative therapy: Platelet-rich plasma (PRP), stem cell therapy — emerging evidence base for selected conditions
• Surgical fusion: Intertarsal joint fusion (surgical or chemical) for end-stage bone spavin; eliminates pain by eliminating movement

Exercise and Welfare

Appropriate, consistent exercise maintains muscle support, joint fluid production, and overall wellbeing in arthritic horses. Complete rest is usually counterproductive; graded, controlled exercise tailored to the individual's comfort level is the welfare-optimal approach.

Key Takeaways

Equine arthritis requires honest quality of life assessment and multimodal management. Combining appropriate analgesia, joint management, tailored exercise, and specialist farriery allows many horses with OA to maintain good welfare for years — making regular monitoring and proactive management the foundations of arthritic horse welfare.