Horse Sweet Itch Welfare Management

Sweet itch (insect hypersensitivity) causes intense, chronic itching in susceptible horses and ponies, significantly affecting their quality of life through the grazing season.

Key Facts

Sweet itch is caused by hypersensitivity to Culicoides midge bites affecting an estimated 5% of UK horses
Affected horses show intense pruritus (itching) leading to self-inflicted hair loss, skin damage, and secondary infection
Native pony breeds including Icelandic horses and Shetland ponies show highest prevalence
Culicoides midges are most active at dawn and dusk, informing management strategies
Full-coverage sweet itch rugs significantly reduce midge access and symptom severity
Antihistamines and corticosteroids provide relief but require long-term management
Stabling during peak midge activity periods reduces exposure but creates other welfare trade-offs

Welfare Considerations

Sweet itch causes significant, chronic suffering through constant itching during the entire grazing season. Horses that cannot be relieved of midge exposure experience prolonged welfare compromise. Effective management combines physical barrier protection, midge avoidance, and appropriate medication. Horses with severe sweet itch in poorly managed situations may experience weeks or months of significant welfare deficit.

What You Can Do

Use full-coverage sweet itch rugs and hoods on susceptible horses from spring through autumn
Stable horses during peak Culicoides midge activity (dusk and dawn) where possible
Apply insect repellents approved for equine use to exposed skin areas
Discuss medical management options including antihistamines with your vet
Avoid purchasing horses from regions without Culicoides for use in high-risk areas (risk of naive sensitisation)