Farm Animal Welfare

Sheep Headfly Welfare Management

Headfly (Hydrotaea irritans) causes chronic distress in sheep through persistent attack around the head and wounds it creates, requiring integrated management for welfare protection.

Key Facts

Headfly attacks concentrate around the head and can cause wounds from self-trauma
Persistent fly harassment causes severe behavioural disruption and chronic stress
Sheep stomp, huddle, and seek shade excessively during fly attack periods
Pour-on insecticide treatments provide effective temporary protection
Breeding for naturally resistant breeds is a long-term management strategy

Welfare Considerations

Headfly harassment causes genuine welfare-relevant suffering through both the direct irritation of fly attack and the exhausting disruption of normal behaviour that results. Effective fly management during peak headfly seasons is a welfare obligation for sheep keepers in affected areas.

What You Can Do

Apply appropriate insecticide treatments during peak headfly periods
Learn about headfly risk periods and management approaches in your region
Support research into breed resistance to headfly and other ectoparasites