Animal-Based Measures to Assess the Welfare of Extensively Managed Ewes.
Authors: Munoz Carolina, Campbell Angus, Hemsworth Paul, Doyle Rebecca
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Assessing welfare in extensively managed sheep requires practical, reliable indicators that can be consistently applied across different handlers and production stages. This 2017 study evaluated ten potential animal-based welfare measures on 100 mid-aged Merino ewes across three key production periods (mid-pregnancy, mid-lactation and weaning), using nine trained observers to establish inter-rater reliability and feasibility in the field. Six measures emerged as both reliable and feasible: body condition score, fleece condition, skin lesions, tail length, dag score, and lameness assessment—each demonstrating strong observer agreement through statistical validation (percentage agreement, Kendall's W and Kappa values). These validated indicators work synergistically to provide a snapshot of current ewe welfare whilst simultaneously flagging historical or emerging problems, making them particularly valuable for practitioners conducting welfare audits or herd health assessments on pasture-based systems. For farriers, vets and other equine professionals advising on or managing extensive livestock, these measures offer a practical framework for rapid, objective welfare evaluation that doesn't require specialist equipment or laboratory analysis.
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Practical Takeaways
- •Use the six reliable measures (BCS, fleece condition, skin lesions, tail length, dag score, lameness) as a practical welfare assessment toolkit for extensively managed flocks
- •Multiple trained observers can achieve consistent scoring using these measures, making them suitable for farm monitoring programs
- •Focus monitoring efforts on nutritional and health measures rather than difficult-to-assess indicators like rumen fill or hoof metrics in grazing systems
Key Findings
- •Six of ten animal-based welfare measures (BCS, fleece condition, skin lesions, tail length, dag score, and lameness) demonstrated good observer agreement and reliability in extensively managed ewes
- •Measures of rumen fill, foot-wall integrity, and hoof overgrowth were not deemed feasible for practical use in extensive production systems
- •Combined assessment of nutritional and health indicators provides snapshot of current and previous welfare status in grazing sheep