Rectal Prolapse in Pigs: Prevention and Welfare

Rectal prolapse is a painful welfare emergency in pigs caused by straining from various underlying conditions, requiring prompt intervention and preventive management.

Key Facts

Rectal prolapse occurs when the rectal mucosa protrudes through the anus
Risk factors include coughing, diarrhea, constipation, Vitamin E/selenium deficiency, and low fiber diets
Mycotoxin contamination (particularly zearalenone and fumonisin) increases prolapse risk
Prolapse is painful, causes rapid deterioration, and predisposes to rectal stricture
Early prolapse can be reduced and managed; advanced cases may require amputation
Pen-level prolapse rates above 1% suggest a systemic management or nutritional problem
Tail biting increases the risk of rectal prolapse in bitten pigs

Welfare Considerations

Rectal prolapse causes acute pain and distress. Affected pigs are often attacked by pen mates, worsening injury and suffering. The condition is frequently a sentinel for broader management problems - high disease pressure, poor nutrition, or mycotoxin contamination. Investigation of prolapse clusters is a welfare obligation, not just a production concern. Prompt veterinary treatment of individual cases combined with root cause investigation protects the whole group.

What You Can Do

Investigate feed and mycotoxin status when prolapse rates increase above baseline
Ensure dietary fiber is adequate and transition rations gradually
Check for underlying respiratory disease and diarrhea contributing to straining
Separate and treat affected animals promptly to prevent attack by pen mates
Seek veterinary assessment for any rectal prolapse that cannot be easily reduced