Electronic and conventional ear tagging of sheep is required for regulatory compliance, and tag design and application technique significantly affects welfare.
Ear tagging is an acute welfare event that causes pain through tissue penetration. Proper technique including correct placement, appropriate tag size, and equipment disinfection minimises this harm. Poorly applied tags that cause chronic ear infection or mechanical damage to the ear represent ongoing welfare harm that is entirely preventable. Regular welfare checks should include ear inspection for tag-related problems.