Sow Lameness: A Critical Welfare Issue in Pig Farming

Lameness in breeding sows is one of the most prevalent and impactful welfare problems in commercial pig production. It causes chronic pain and is a leading reason for premature culling.

Key Facts

Lameness affects an estimated 15-30% of sows in commercial herds at any given time
Leading causes include osteochondrosis, foot lesions, joint infections, and floor-related injuries
Sows in gestation crates are at higher risk due to restricted movement and muscle atrophy
Lame sows eat less, produce fewer and smaller piglets, and are culled earlier
Concrete flooring without adequate cushioning contributes significantly to foot and leg problems
Pain assessment in sows uses gait scoring systems developed from research

Welfare Considerations

Sow lameness represents chronic pain — often unrecognized and undertreated in commercial settings. Pain inhibits feeding, social behavior, and maternal care, creating a cascade of welfare harms. Gestation crate housing prevents sows from altering their posture to relieve discomfort, worsening outcomes. Farms transitioning to group housing with appropriate flooring and space show reduced lameness prevalence. Regular gait scoring, prompt treatment with veterinary-prescribed analgesics, and preventive hoof care are the foundation of sow lameness welfare programs.

What You Can Do

Support welfare standards requiring regular lameness monitoring and treatment in pig farms
Choose pork from certified higher-welfare producers with group housing systems
Advocate for flooring quality standards that reduce leg and foot injuries
Encourage pig farms to adopt pain management protocols for lame sows