Mulesing - surgical skin removal from merino sheep to prevent flystrike - is controversial. Alternative prevention methods that avoid this painful procedure are being developed and adopted by progressive wool producers.
Mulesing causes significant acute pain at the time of procedure and chronic pain as the wound heals over 2-4 weeks. Research on pain indicators shows that mulesed lambs show altered posture, reduced activity, and physiological stress markers consistent with significant pain. Without analgesia - which is not routinely provided - this pain is unmitigated. The welfare case for alternatives is supported by the existence of effective substitutes: breech modification genetics achieves protection through selection rather than surgery; chemical prevention provides effective short-term protection. The welfare-cost analysis of mulesing versus alternatives requires honest accounting: mulesing provides multi-year protection from a single procedure, while chemical alternatives require repeated application. However, genetics-based solutions that eliminate the susceptibility are the most welfare-positive approach, avoiding the underlying cause of both mulesing and flystrike entirely.