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Welfare implications of sheep ear tags
1Department of Farm Animal and Equine Medicine and Surgery, Royal Veterinary College, University of London, North Mymms, Hatfield.
The Veterinary Record
|July 3, 1999
Summary
Sheep ear tag type significantly impacts lesion severity. Metal loop and plastic loop tags caused the most damage, while flexible plastic tags like
Area of Science:
- Veterinary Medicine
- Animal Science
- Agricultural Technology
Background:
- Ear tags are crucial for livestock identification.
- Assessing the welfare implications of ear tagging is essential for animal husbandry.
- Previous research has not comprehensively evaluated the lesion-inducing potential of various ear tag designs.
Purpose of the Study:
- To evaluate the pathological effects of different sheep ear tag types.
- To identify ear tag designs associated with minimal tissue damage.
- To inform best practices for sheep identification methods.
Main Methods:
- Examination of 1040 sheep ears post-slaughter across three abattoirs and one farm.
- Categorization of ear tags into six distinct types based on material and design.
- Assessment of ear lesions, noting severity and location in relation to tag placement.
Main Results:
- Metal loop and one-piece plastic loop tags were associated with the highest incidence and severity of ear lesions.
- Ear tags placed near the ear tip correlated with increased damage.
- Allflex-style flexible plastic tags and golf tee-shaped plastic tags demonstrated the lowest rates of ear lesions.
Conclusions:
- The choice of ear tag design significantly influences the degree of ear damage in sheep.
- Flexible plastic tags, particularly the Allflex style and golf tee shape, are recommended for reduced lesion occurrence.
- Veterinary and agricultural professionals should consider tag design and placement to minimize animal welfare concerns.