Mulesing in Merino Sheep: The Welfare Debate Around a Contested Practice

Mulesing — surgical removal of skin folds around the breech of Merino sheep without anaesthesia — is a painful practice used to prevent blowfly strike in Australia, at the centre of a sustained international welfare debate with industry commitments to phaseout that have repeatedly stalled.

Key Facts

Mulesing involves cutting away skin folds around the tail and breech of Merino lambs, typically at 2-12 weeks of age, without anaesthesia
The practice creates scar tissue that is less susceptible to blowfly strike — a condition where flies lay eggs in soiled wool, causing maggots to feed on living tissue
Blowfly strike is itself a serious welfare problem, causing severe pain, tissue damage, and death if untreated
Australia mulesed approximately 80% of its Merino flock historically, though the rate has declined with welfare pressure and alternative development
The RSPCA, PETA, and major international wool buyers have long campaigned against mulesing
Pain relief during and after mulesing is recommended but not universally applied — uptake of analgesics at mulesing has increased substantially in recent decades
Alternative approaches including selective breeding for plain-bodied sheep and genetic markers for low fly strike susceptibility are advancing but not yet fully scalable

Welfare Considerations

Mulesing causes acute, real pain. Performing surgical skin removal on conscious lambs without anaesthesia would not be acceptable in any other context — the procedure is equivalent to surgery performed without pain relief. The welfare justification offered is prevention of blowfly strike, which is also genuinely terrible for sheep. This creates a genuine ethical tension between two sources of suffering. However, the options are not limited to mulesing or blowfly strike: targeted selective breeding, improved management, fly monitoring, and protective chemicals all contribute to alternatives. The failure to mandate pain relief at mulesing, and the slow progress toward alternative management, reflect an industry that has been slow to prioritise welfare when welfare practices impose costs.

What You Can Do

Choose wool products certified as non-mulesed or from countries where mulesing is not practiced (e.g., New Zealand, South Africa)
Support retailers and wool brands that have made binding commitments to source only non-mulesed wool with verified timelines
Advocate for mandatory pain relief (anaesthesia and analgesia) as a minimum standard for any mulesing still practiced
Support research into and commercial development of blowfly-resistant Merino genetics to accelerate the transition away from mulesing
Engage with Australian wool industry certification bodies to press for credible phaseout timelines with enforcement
Reduce wool consumption or choose certified alternatives to reduce demand pressure on intensive Merino production systems