Livestock Fly Control and Welfare

Fly strike, warble flies, and stable flies cause significant welfare harm to livestock, with prevention being the most effective and humane strategy.

Key Facts

Blowfly strike (Lucilia sericata) affects millions of sheep annually in the UK, causing severe tissue damage
Strike risk increases significantly in warm, wet weather following periods of fleece contamination
Preventive insecticide treatments applied to the breech area significantly reduce strike incidence
Dagginess from diarrhoea is the primary risk factor for fly strike and should be addressed promptly
Stable flies cause painful biting that increases stress and reduces feed intake in cattle
Warble fly (Hypoderma spp.) has been eradicated from the UK through a successful control programme
Electronic fly traps and habitat management can reduce stable fly populations without chemical use

Welfare Considerations

Fly-related welfare problems cause significant, preventable suffering in millions of livestock animals annually. Blowfly strike in particular causes one of the most severe acute welfare emergencies in sheep farming - tissue destruction and death if not treated within hours of onset. Prevention through appropriate preventive treatments and rapid detection is an ethical obligation for sheep farmers.

What You Can Do

Implement a fly strike prevention programme for your sheep using appropriately timed insecticide treatments
Monitor sheep daily during high-risk weather for early signs of fly strike
Address risk factors including dagginess and wounds promptly to reduce strike susceptibility
Use physical fly control methods including traps and habitat management to reduce stable fly pressure
Support RUMA guidelines on responsible insecticide use for fly control in livestock