Displaced Abomasum in Dairy Cows: Periparturient Welfare Challenge

Left displaced abomasum (LDA) is the most common surgical emergency in dairy cows, occurring primarily in the first weeks after calving and causing significant pain, reduced milk production, and welfare harm without prompt treatment.

Key Facts

Left displaced abomasum occurs in 2-5% of dairy cows, most commonly within the first 4 weeks of calving
The abomasum (true stomach) fills with gas and shifts from its normal position to the left side of the abdomen
Risk factors include hypocalcaemia, ketosis, retained placenta, twins, and low dry matter intake in the transition period
Clinical signs include reduced feed intake, ketosis, reduced milk yield, and the characteristic "ping" on percussion of the left flank
Treatment options include rolling, toggle fixation, right flank laparotomy, and paramedian laparotomy depending on severity
Early surgical intervention results in better welfare outcomes and higher survival rates than delayed treatment
Prevention focuses on transition cow management: maximising dry matter intake, managing body condition score, and preventing hypocalcaemia
Cows that develop LDA have significantly increased risk of culling within 12 months compared to healthy herd-mates

Welfare Considerations

Displaced abomasum causes significant discomfort — affected cows show reduced appetite, malaise, and signs consistent with abdominal pain. The condition compounds other periparturient challenges: LDA often co-occurs with ketosis and other metabolic diseases, creating a cluster of welfare problems in the same individual during an already physiologically demanding period. Delayed diagnosis or treatment prolongs suffering and worsens prognosis. Prevention through transition cow management is the most welfare-positive approach, addressing the metabolic conditions that predispose cows to displacement. Farm health plans that monitor transition cow health markers (including ketone levels and feed intake) enable early identification of at-risk individuals before displacement occurs.

What You Can Do

Support transition cow management programmes on dairy farms that address hypocalcaemia and ketosis prevention
Advocate for regular monitoring of fresh cow health including ketone testing in the first 2 weeks post-calving
Choose dairy products from farms with certified welfare standards that include periparturient health monitoring
Support research into improved transition cow management strategies that reduce LDA and related metabolic disease incidence
Encourage veterinary farm health plans to treat LDA prevention as an integrated metabolic disease management priority