Twin lamb disease, also known as pregnancy toxemia, is a metabolic disorder that affects pregnant ewes, particularly those carrying multiple lambs. According to the UK's Agriculture and Horticulture Development Board (AHDB), the condition occurs when the ewe's energy requirements exceed her intake, leading to a buildup of ketones in the blood. Symptoms include lethargy, loss of appetite, and neurological signs such as blindness or circling.
Recent reports from veterinary sources in the UK indicate that cases have been observed in flocks during late pregnancy, especially in ewes carrying twins or triplets. The disease is most common in the final weeks of gestation when fetal growth is rapid. The National Animal Disease Information Service (NADIS) notes that risk factors include poor body condition, inadequate nutrition, and stress from weather or handling.
Prevention focuses on proper feeding management, including providing high-energy concentrates in the last six weeks of pregnancy. Treatment options include oral propylene glycol or intravenous glucose, but severe cases may require early lambing or euthanasia. The AHDB advises farmers to monitor body condition scores and adjust feed accordingly.
No official outbreak statistics have been released for 2026, but the condition is considered endemic in sheep-rearing regions. The UK's Department for Environment, Food & Rural Affairs (Defra) recommends consulting a veterinarian if symptoms appear.
