Livestock

Horse Welfare and Fly Control in Summer Management

Fly nuisance causes significant stress and welfare problems for horses in summer, with integrated management strategies providing effective relief.

Key Facts

Flies cause face rubbing, skin irritation, and eye infections in horses
Sweet itch (insect bite hypersensitivity) is caused by Culicoides midge bites and affects 2-5% of horses
Mesh fly masks, rugs, and physical barriers provide protection without chemical use
Repellent products vary in efficacy — those containing DEET or permethrin are most effective
Stable management including muck removal and good drainage reduces fly breeding sites

Welfare Considerations

Fly nuisance causes chronic stress and welfare compromise ranging from mild irritation to serious secondary skin infections and weight loss from constant movement to escape biting insects. Sweet itch causes intense pruritus, self-trauma, and secondary infections in severely affected horses. An integrated approach combining physical protection, environmental management, and targeted use of repellents provides the most effective and sustained welfare improvement.

What You Can Do

Provide mesh fly protection such as masks and rugs for horses during summer
Remove muck from paddocks and yards regularly to reduce fly breeding sites
Seek veterinary advice for horses with sweet itch for appropriate management and treatment
Use insect repellents as part of a broader fly management approach, not as a sole strategy