Companion Animals

Horse Sweet Itch Behavioural Impact

Sweet itch (insect bite hypersensitivity) in horses causes intense pruritus and self-mutilation, with profound effects on behaviour and quality of life.

Key Facts

Sweet itch is caused by hypersensitivity to Culicoides midge bites
Affected horses may rub mane and tail raw, causing open sores
The condition recurs annually throughout the midge season
Full-body fly rugs reduce midge contact and can significantly reduce symptoms
Immunotherapy and oral antihistamines offer partial relief for severe cases

Welfare Considerations

Sweet itch causes sustained, severe itching and self-inflicted wounds. Management requires consistent seasonal protection and veterinary support.

What You Can Do

Stable horses at dawn and dusk when midges are most active
Use high-quality full-body sweet itch rugs during midge season
Apply appropriate insect repellents regularly
Discuss immunotherapy or antihistamine options with a vet