Farmed Pig Lameness: Causes and Prevention

Lameness affects up to 30% of breeding sows and is a leading welfare problem in commercial pig production requiring systematic management.

Key Facts

Lameness is estimated to affect 10-30% of sows in commercial herds at any given time
Common causes include foot lesions, leg joint infections, osteochondrosis, and claw disorders
Concrete flooring and wet conditions cause claw overgrowth, cracking, and subsequent bacterial infection
Osteochondrosis developmental joint disease is exacerbated by rapid growth and hard flooring
Lame sows have reduced food intake, reproductive performance, and are more likely to be culled
Regular foot trimming and floor quality management are practical preventive interventions
Lameness scoring systems allow systematic identification and prioritization of affected animals

Welfare Considerations

Lameness causes chronic pain that affects every step, rising, and lying movement. Lame sows spend more time lying and less time at feeders, causing malnutrition that compounds their welfare problems. The high prevalence in commercial production indicates systemic failures in floor design and management rather than unavoidable individual illness. Addressing floor surfaces, providing bedding, and implementing regular lameness monitoring are practical welfare improvements with simultaneous production benefits.

What You Can Do

Support welfare certification schemes requiring lameness monitoring and treatment protocols on pig farms
Advocate for minimum flooring standards reducing claw injury risk in commercial pig production
Choose pork from certified welfare-higher operations where lameness rates are monitored and managed
Support research into flooring designs and management practices that reduce sow lameness prevalence
Engage food companies on including lameness monitoring in their pig supply chain welfare requirements
Donate to farm animal welfare organizations working on sow lameness prevention and treatment