Sheep Pregnancy and Periparturient Welfare: A Comprehensive Guide
The periparturient period is the highest-welfare-risk phase of the sheep production cycle, requiring intensive monitoring and rapid intervention capability.
Key Facts
- Twin-bearing ewes are at risk of pregnancy toxemia, hypocalcaemia, and dystocia simultaneously
- Dystocia (difficult birth) causes pain, lamb and ewe mortality without prompt intervention
- Early detection of pregnancy complications requires frequent observation (every 4-6 hours at peak lambing)
- Adequate nutrition in the last 6 weeks of pregnancy is the single most important welfare investment
- Lambing facilities must provide warmth, cleanliness, and adequate space for welfare-critical interventions
Welfare Considerations
The lambing period concentrates the highest welfare risks of the sheep production cycle into a few intense weeks. Ewes face metabolic crises (pregnancy toxemia, hypocalcaemia), obstetric emergencies (dystocia), and infectious challenges (mastitis, metritis) simultaneously, while newborn lambs face hypothermia, mismothering, and starvation risks. The welfare standard of a lambing operation is determined by the frequency of observation — farms checking ewes every 4-6 hours during peak lambing can intervene at the critical window; farms checking twice daily miss the welfare window for many complications. Staff training in obstetric assistance, metabolic disease recognition, lamb resuscitation, and hypothermia treatment is essential for welfare-optimized lambing operations.
What You Can Do
- Implement a lambing observation schedule of at least every 4-6 hours during peak lambing
- Ensure adequate nutrition is provided in the last 6 weeks before lambing based on ewe condition scores
- Train all lambing staff in assisted delivery, colostrum supplementation, and metabolic disease recognition
- Maintain a warm, clean lambing area with adequate space for ewes and lambs
- Keep an emergency lambing kit including metabolic supplements, colostrum, and obstetric equipment