What is sweet itch in horses?

Sweet itch, also known as Equine Insect Bite Hypersensitivity (IBH), is the most common allergic skin condition in UK horses. It is caused by an allergic reaction to the saliva of Culicoides midges, which are most active in the UK from March through to October. Around 5% of UK horses are affected.

When do midges peak in the UK?

Midges begin emerging in March and April, with peak season from May to July during warm, humid evenings. Activity continues through August to October, particularly after rain. Midges are most active at dawn and dusk.

What is the best natural sweet itch treatment for horses in the UK?

The most effective natural approach combines: starting repellent treatment before midge season begins in February or March, using an oil-based fly repellent that stays on the coat for several hours, applying a soothing skin balm to affected areas, adjusting turnout to avoid dawn and dusk, using a well-fitted fine-mesh sweet itch rug with full belly coverage, and supporting skin health year-round with omega supplements and a sulphate-free shampoo.

How do you stop a horse rubbing from sweet itch?

To stop a horse rubbing from sweet itch: apply a natural fly repellent daily before turnout, treat affected skin with a soothing balm morning and evening, stable the horse between 4pm and 9am during peak midge season, use a fine-mesh sweet itch rug with full belly coverage, and move the horse away from ponds, streams and woodland where midges breed.

When should you call the vet for sweet itch?

Contact a vet if your horse has open sores or signs of secondary infection such as discharge, heat or swelling, severe uncontrollable itching causing self-injury, symptoms appearing unusually early or much worse than previous seasons, or if you are unsure whether the condition is sweet itch or another skin condition.

Does fly spray actually work on horses?

Conventional sprays work short-term but lose effectiveness quickly because they're mostly water and evaporate within an hour or two. Oil-based repellents like a solid bar bond to the coat rather than sitting on the surface, which is why they last significantly longer — up to 7 hours per application with the Equine No Fly Bar.

How long does the Equine No Fly Bar last?

Up to 7 hours from a single application. Reapply after heavy rain, sweating, or once protection starts to wane — typically once in the late afternoon during peak midge season (June–August) is enough for most horses.

Is DEET safe for horses?

DEET-based repellents can cause skin irritation and allergic reactions, particularly in horses with sensitive skin or existing conditions like sweet itch. Natural, DEET-free alternatives using neem, lemongrass and catmint provide effective protection without that risk.

What's the best fly control for a horse barn?

A combination approach works best: daily muck removal, fly traps or predators to reduce numbers at the source, good ventilation, and a direct repellent on the horse for the flies that get through.

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Horse Fly Repellent & Fly Control: The Complete Guide

2 min read

Horse Fly Repellent & Fly Control by the solid bar company

Flies aren't just irritating — they're a genuine welfare issue. Left unmanaged, fly activity around horses leads to head shaking, stamping, weight loss from disrupted grazing, skin irritation, and in sensitive horses, sweet itch flare-ups. The right repellent does most of the work, but it performs even better paired with good barn hygiene. Here's how to get both right.

Choosing the Right Horse Fly Repellent

Most owners default to a spray without questioning it. The problem: most fly sprays are around 90% water and carrier solvent. You're paying for a bottle that's mostly evaporating on contact, they hiss and startle nervous horses, and they need reapplying constantly through the day.

The Solid Bar Company's No Fly bar repellent applied to a horse

The alternative: the Equine No Fly Bar is a concentrated solid repellent — 100% active ingredients (natural butters, oils, infused catmint, lemongrass and neem), with zero dilution and zero waste. It's rubbed or rolled directly onto the coat, so there's no hissing sound and no spray mist, which makes it a genuine option for spray-shy horses. Independently tested by Horse & Hound, it scored 9/10 overall and deters flies, midges, gnats, mosquitoes, noseeums and black fly for up to 7 hours from a single application. It's also FEI competition compliant, so it's safe to use if you compete.

For best results, apply to the neck, mane crest, belly, behind the ears and base of the tail — the areas midges target most — and reapply after 6–7 hours, or after heavy rain or sweating.

Fly Control Around the Yard

Every repellent works harder when there are fewer flies to begin with. A few habits make a real difference alongside direct protection:

● Muck out daily, not weekly. Manure is the single biggest breeding ground for stable flies. A pile left for more than 48 hours can produce a new generation of flies.

● Keep muck heaps well away from stables — at least 30 metres if possible, and cover them if you can.

● Deal with standing water. Water troughs, old tyres, blocked gutters and puddles are where flies and midges breed. Empty and refresh troughs regularly.

● Use fly predators or traps as a first line of defence. Parasitic wasps (fly predators) and sticky traps hung around — not directly above — stabled areas reduce the adult fly population without chemicals.

● Improve airflow. Flies are weaker fliers than they look — a stable with good airflow or a barn fan will have noticeably fewer flies than a still, enclosed one.

Fly Control Checklist for Your Yard

1. Muck out and remove droppings daily

2. Site the muck heap away from stabled horses

3. Empty and clean water troughs weekly

4. Hang fly traps or introduce fly predators early in the season (before numbers build)

5. Improve stable ventilation where possible

6. Apply a direct repellent — Equine No Fly Bar — focusing on the neck, mane crest, belly, behind the ears and base of the tail, where midges target most

7. Reapply after 6–7 hours, or after heavy rain or sweating

Shop Fly Control for Horses

Equine No Fly Bar — from £12.99. Horse & Hound approved, 9/10 overall. Up to 7 hours of protection per application. 100% natural, DEET-free, FEI compliant.