Sheep Fly Strike Prevention and Welfare

Blowfly strike causes extreme pain and rapid death in sheep, with proactive prevention through shearing, chemical treatment, and mulesing alternatives essential.

Key Facts

Blowfly strike occurs when Lucilia cuprina flies lay eggs in wet or soiled fleece, producing flesh-eating maggots
Affected sheep can die within days from toxemia and shock if untreated
Australia has the world's highest fly strike incidence due to Merino breed predisposition and climate
Mulesing - removing breech wool and skin - is highly effective but causes significant acute pain
Pain relief during mulesing is available but historically underused
Alternatives including genetic selection for plain body sheep and chemical preventatives are reducing mulesing dependence

Welfare Considerations

Blowfly strike causes extreme suffering - maggots consume living tissue causing pain, toxemia, and death in days. Prevention is the welfare priority. Mulesing, though painful, provides lifetime protection for susceptible breeds in high-risk environments. The welfare calculation must weigh the acute pain of mulesing with analgesia against the risk of repeated strike events without it. Developing alternatives that provide equivalent protection without surgical intervention is a significant welfare research priority.

What You Can Do

Support pork producers transitioning to mulesing-free production through breed selection and chemical protection
Advocate for mandatory pain relief during mulesing in all jurisdictions that still permit the practice
Choose wool from non-mulesed sheep or mulesed-with-pain-relief flocks where certification exists
Support research into fly strike-resistant Merino genetics as a mulesing alternative
Monitor sheep daily during fly strike season - early detection dramatically reduces suffering
Report any sheep showing signs of fly strike to the farmer or animal welfare authorities immediately