How to score an ewe’s condition
Body condition scoring (BCS) is a hands-on method to assess the fat and muscle cover on a ewe. It’s done by feeling along the spine and loin muscles. The scoring system ranges from 1 (too thin) to 5 (overfat), but many farmers use a simpler approach:
- Thin (needs feeding up)
- Fit (ideal condition)
- Fat (needs careful management)
How often should BCS be checked?
- Breeding ewes: Check 8 weeks before mating so adjustments can be made in time.
- Late pregnancy: Monitor 6–8 weeks before lambing to prevent issues like pregnancy toxaemia.
- Weaning: Check after weaning to ensure ewes recover properly before the next cycle.
Why does BCS matter?
BCS is an essential management tool for optimising productivity and profitability. It helps prevent issues related to poor fertility, lamb survival, milk production, and overall ewe health.
- Thin ewes struggle to maintain pregnancies and produce healthy lambs.
- Overfat ewes have a higher risk of prolapse, poor colostrum quality, and lambing difficulties.
- Lambs destined for market can also be assessed using BCS to ensure they’re in the right condition.
What’s the right BCS for your flock?
The ideal BCS changes slightly throughout the year, but as a general rule:
- Aiming for BCS 3 year-round keeps you on the right track.
BCS is a guideline, not a strict rule, and different farmers may score the same ewe slightly differently. The key is regular assessments so you can adjust nutrition and management at the right time.
BCS targets for better flock performance
- No breeding ewe should be below a BCS of 2.
- Ewes below BCS 2.5 are at risk of poor fertility, weak lambs, and lower survival rates.
- Ewes in BCS 2.5–3.5 perform best for production and profitability.
- Ewes above BCS 3.5 may still be productive but is not profitable to maintain and may impact lamb growth rate.
How to safely adjust ewe body weight
Each BCS unit is equal to about 10–12% of a ewe’s mature weight. For example, a 70kg ewe would need to gain or lose about 7–8kg to shift one full score. This process takes 6–8 weeks with proper feeding adjustments.
- Plan ahead: Make sure ewes reach the right BCS before breeding for the best mating results.
- Low BCS? Ewes under BCS 2 may need extra feeding—and it’s crucial to identify health problems early (like poor teeth or lameness) that could be holding them back. If a ewe has permanent issues like bad teeth, she should be culled at the right time to avoid ongoing losses.
Feed recommendations:
- Underweight ewes (BCS <2.5): Supplement with high-energy concentrates (e.g. maize, barley) and protein sources (e.g. soybean meal).
- Maintenance ewes (BCS 2.5–3.5): Balanced grazing with possible mineral supplementation.
- Overfat ewes (BCS >3.5): Controlled roughage diet and higher stocking density on lower-quality grazing or use them to clean up paddocks after other livestock.
Handling overfat ewes (>3.5 BCS)
Ewes that carry too much weight can have lower fertility (less twins), poor milk production, and a higher risk of prolapse. They should be managed separately to gradually bring them down to the right BCS.
Practical steps to reduce BCS
Overfat ewes need controlled weight loss over several weeks. Sudden weight loss before mating can harm fertility.
Suggested 6-week plan for overfat ewes:
- Weeks 1–2: Increase movement—rotate ewes through paddocks with moderate-quality grazing.
- Weeks 3–4: Limit high-energy feed and increase fibre intake (low-quality roughage helps with gradual fat loss).
- Weeks 5–6: Use them to clean up paddocks after other livestock; monitor condition weekly to ensure they reach BCS 3 before mating.
- Avoid excessive weight loss in the final 6 weeks before mating—this can negatively impact ovulation and embryo survival.
Final Takeaway – Make BCS part of your routine
• Regular BCS checks help you make the right nutrition and management decisions.
• Keep an eye on your flock’s condition and adjust feeding accordingly.
• Need help choosing the right feeds or supplements? Overberg Marketplace has you covered with quality animal nutrition products.
