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Tags applied in the incorrect manner combined with humid weather can be a recipe for disaster and lead to ears becoming infected. Buyers of ewe lambs with breeding potential in marts are particularly conscious as to the way in which tags are applied. Some say there are greater issues this year given a second tag has to be applied, while others point to the fact that many farmers are new to applying wrap-around tags as creating some issues.
The way sheep are tagged will have a significant influence on tag loss rates and the risk of ear infections. The advice for applying button tags is to insert the tag midway in height of the ear taking care to avoid cartilage (can be seen on the underside of the ear) and at a distance of about one third of the way along the animal's ear, measuring from the head out. This distance may need to be extended in breeds with thicker ears as there should be some room for the tag to rotate and for air to circulate around the site of application.
Tag manufacturers are keen to advise farmers who may be new to applying wrap-around tags to take care as to the way they are applied, particularly in young sheep that are not going directly for slaughter. They advise applying the tag in a manner that leaves room between the edge of the ear and the tag. This is to ensure tags do not become too tight as animals mature and ears grow.
The general recommendation is to allow 4mm to 5mm for ear growth and again more may be necessary for breeds with large or thick ears. Wrap-around tags are advised to be applied at the top of the ear and similarly to a button tag – about a third of the distance out from the head, taking care not to pierce cartilage. The male part that pierces the ear should be applied on the outer part, leaving less risk for tags to get caught.
Where at all possible, tag when ears are dry and ensure the sheep is securely restrained. Disinfecting tags and the ear is also beneficial.
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