Companion Horse: Sweet Itch Welfare and Management

Sweet itch, an allergic skin condition caused by sensitivity to Culicoides midge bites, causes severe chronic suffering in affected horses and ponies during the summer season.

Key Facts

Sweet itch affects approximately 3-5% of horses and ponies in the UK, with native breeds most susceptible
The condition is a hypersensitivity reaction to midge saliva, causing intense itching along mane, tail, and dorsal midline
Affected horses rub themselves raw, causing open wounds that attract secondary infection and flies
Symptoms develop seasonally from spring to autumn when Culicoides midges are active
Full-body sweet itch rugs that prevent midge access provide significant symptom reduction
Ivermectin, corticosteroids, and antihistamines provide varying levels of relief in affected animals

Welfare Considerations

Sweet itch causes one of the most distressing chronic welfare conditions in companion horses. The relentless itching drives affected horses to rub themselves to the point of severe self-inflicted skin damage - raw, bleeding, infected areas along the mane, withers, and tail-head. The condition persists for the entire summer season, causing months of daily suffering in affected animals. Management with barrier rugs, stabling during peak midge activity at dawn and dusk, and appropriate veterinary treatment significantly reduces suffering. Owner commitment to consistent sweet itch management is the most important determinant of welfare outcomes for affected animals.

What You Can Do

Invest in a full-coverage sweet itch rug for affected horses from the beginning of the midge season
Stable horses during peak midge activity at dawn and dusk through the summer season
Consult a veterinarian about corticosteroid or antihistamine treatment for severely affected animals
Avoid grazing affected horses near water bodies and sheltered spots where midges concentrate
Consider desensitisation immunotherapy for horses with severe recurrent sweet itch