Blowfly strike is one of the most severe and preventable welfare problems in sheep farming, causing rapid tissue destruction and painful death if untreated. Systematic prevention is both a welfare and economic imperative.
Sheep flystrike is among the most acutely painful and rapidly progressing welfare emergencies in livestock farming. The larvae of blowflies, hatching in warm moist wool conditions caused by faeces or urine soiling, rapidly penetrate skin and begin consuming living tissue. An affected sheep experiences intense pain, rapidly becomes depressed and withdraws from the flock, and without treatment dies within days in distress. The preventability of this condition makes its continued occurrence all the more serious as a welfare failure: effective preventive treatments exist and are economically justified, daily monitoring during peak risk periods catches cases early when treatment is effective, and breeding and management strategies can reduce susceptibility. In Australia, the debate around mulesing reflects this welfare complexity — the procedure causes acute pain but prevents a condition that causes more prolonged suffering. The trajectory toward breeding solutions and effective topical prevention that eliminate the need for mulesing represents the most welfare-positive direction for the industry.