Lameness Treatment in Sheep: Welfare Guide

Lameness and Sheep Welfare

Lameness is the most common and welfare-significant problem in UK sheep flocks, causing chronic pain, reduced productivity, and significant economic losses. Despite its prevalence, lameness is often undertreated — evidence shows that prompt treatment with analgesics alongside antibiotics significantly improves welfare outcomes.

Main Causes of Lameness

• Footrot (Dichelobacter nodosus): Most common cause; contagious; distinctive foul smell; spreads rapidly in wet conditions. Both interdigital skin and underrun horn affected in virulent strains.
• Scald (interdigital dermatitis): Milder than footrot; red, inflamed interdigital skin; often precedes footrot.
• CODD (Contagious Ovine Digital Dermatitis): Emerging, highly contagious; spirochaetal infection causing severe under-running of horn and significant pain; increasing in UK flocks.
• White line disease: Separation of white line allowing impaction and secondary infection.
• Shelly hoof (foot abscess): Abscess forming within the hoof; very painful; requires correct drainage.
• Toe granuloma: Overgrowth of soft tissue after extensive footrot; requires specific treatment.

The Welfare Imperative for Analgesia

Scientific evidence is unequivocal: lame sheep are in pain. Treatment of lameness with antibiotics alone is suboptimal — NSAID (meloxicam) administration alongside antibiotic treatment significantly improves recovery rates and reduces pain duration. This is both an ethical obligation and the most effective treatment strategy.

Treatment Protocols

• Footrot: Systemic oxytetracycline (most effective) or penicillin + NSAIDs; Zactran (gamithromycin) for individual treatment; footbath with zinc sulphate or formalin for prevention
• Scald: Topical oxytetracycline spray; foot bathing; often self-resolving with appropriate conditions
• CODD: Parenteral oxytetracycline; isolate affected animals; early treatment critical to prevent spread
• Foot abscess: Careful paring to drain; analgesia; veterinary involvement for severe cases

Prevention

• Routine foot bathing with zinc sulphate (10%) after housing and high-risk periods
• Footrot vaccination (Footvax) in endemically affected flocks
• Quarantine of purchased sheep before introduction
• Reduce mobility stress and wet, muddy conditions
• Regular foot inspection and early treatment to prevent chronicity

Target: <2% Flock Lameness

Industry and welfare targets set lameness prevalence below 2% of the flock as the minimum standard. Chronic or endemic lameness above this level indicates systemic management failure requiring investigation and intervention.

Key Takeaways

Lameness in sheep is painful and treatable. Prompt treatment combining appropriate antibiotics with NSAIDs, accurate diagnosis of the causative condition, and proactive prevention through foot bathing and vaccination are the foundations of sheep foot health welfare management.