Which fly spray for horses really works?

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Excellent Horse Protection Spray Lotion 2.5 l

Every summer, at least one customer in the shop asks me the same question: which fly spray really works. The honest answer depends less on the label on the bottle than on how often and how selectively you use a spray lotion.

I am Rick and I run MHS Equestrian Sports in Bornerbroek. We supply riders and horse owners in the Netherlands, Germany and several neighboring countries, and every year the fly season brings us the same questions about sprays, masks and stable protection.

That is why I look at what a spray lotion can actually do, how to apply it correctly, and which mechanical aids close exactly the gaps that no spray can cover on its own.

• Fly spray only works when applied against the direction of the coat and briefly brushed in, so that the lotion reaches the skin, where flies actually bite.
• Areas such as the belly, base of the ears and crest of the mane need a targeted second application when spraying, because horseflies and biting flies bite there first.
• Persistent itching despite using spray is a signal to rethink the issue from the outside (skin) to the inside (feed), rather than simply spraying more.
• A fly mask, ear protection and a browband cover exactly those areas of the body where spray lotion should not be used for safety reasons.
• Fly pressure on the horse decreases noticeably when the fly population is also tackled inside the stable, rather than treating the animal alone.

Which fly spray lasts the longest and provides the best protection?

The Excellent Horse Protection Spray Lotion 2.5 l is designed as a spray lotion that can be applied over large areas of the coat and legs, specifically to accompany a horse during its daily time in the pasture. Its large volume makes it the obvious choice if you spray regularly and do not have a refill bottle in the stable.

If you are already using a FlyNip system, use the Knock-Off FlyNip Refill Pack instead. This is not a standalone spray bottle, but a refill pack that requires an existing FlyNip spray bottle, so it only makes sense if the spray system is already in use.

Sunlight and high temperatures also cause the active ingredients to evaporate more quickly, which means how long one application lasts also depends on that day's weather.

When flies are particularly prevalent, I therefore prefer to reapply smaller amounts more often rather than spraying heavily once in the morning and relying on it for the rest of the day.

How and how often should I apply fly spray correctly?

Fly spray works most thoroughly when you spray against the direction of the coat and then brush it in briefly, rather than applying it only superficially to the outer hairs. This is the only way the spray lotion can reach the skin, where flies actually bite.

The belly, legs, base of the ears, and crest of the mane are the areas where horseflies and biting flies bite first. It is worth applying a second round there, even if the rest of the body has already been treated.

On hot, humid days with lots of time on pasture, a single application in the morning is often not enough. On such days, I spray before the ride and then apply it again in the late afternoon, when fly activity picks up again.

After heavy rain or if the horse has been sweating, the protective layer on the coat is gone. In both cases, you need to spray again; otherwise, you effectively have no protection left for the rest of the time on pasture, no matter how carefully you applied it the first time.

Puck Zebra fly mask

What should I do if my horse keeps itching despite the spray?

If your horse continues to rub or itch restlessly despite being sprayed regularly, Excellent Itch Stop Feed Oil for Horses can provide support from within. Rather than working on the skin like a spray lotion, the feed oil is added to the feed trough, addressing the issue from a different angle.

This creates a two-pronged approach: protection on the skin from the spray, and support from within through the feed oil. Especially during weeks with high insect pressure, when a horse remains restless despite proper application, this combination often makes a noticeable difference.

The reason is that fly spray can repel or kill insects, but it cannot prevent every individual skin reaction to a bite. Some horses react more sensitively to insect saliva than others, regardless of how consistently they are sprayed. This is precisely where the additional feed-based component comes in: it does not replace the spray, but complements it where external protection reaches its limits. If itching persists or worsens, it is also worth checking whether a skin condition, rather than exposure to flies alone, is involved; more on this in the frequently asked questions.

Which mechanical protection is a useful addition to fly spray?

The Puck Zebra fly mask covers the eyes and head, protecting precisely the areas that spray cannot safely reach without running into the eyes. Direct contact with spray is particularly risky around the head and eyes, which is why mechanical protection is the better choice here.

Ears are among the areas where flies tend to settle, and many owners deliberately avoid them when spraying. The Airmesh ear protection and the EarNet Silencer cover precisely this area without spray lotion entering the ear canal.

For the forehead and eye area while riding, when a full mask is not worn, a Comfort+ fly fringe or a colorful fly fringe provides additional protection against flies.

Mechanical protection does not replace spray; it covers precisely the gaps that a spray lotion leaves open for safety reasons.

Mechanical fly protection at a glance: which product covers which area

How can I provide the stable with additional protection against flies?

The Halo 45 insect killer reduces the fly population directly in the stable building, rather than only targeting the horse itself. It works where flies gather during the day, such as along stable aisles, ceiling beams, and above feeding areas, thereby reducing the number of flies that land on the horse in the first place.

Fewer flies in the stable means less respraying of the horse because the overall pressure decreases. When the population in the building remains small, one application on the horse in the morning is often enough instead of having to reapply several times a day. This is particularly helpful in stables with several horses, where flies would otherwise spread from stall to stall.

This combination of stable hygiene and spray on the horse is the difference between spraying once a day and constantly reapplying. A clean, well-ventilated stable with a reduced number of flies takes some of the work off the spray lotion on the horse. Combining both means less effort for the animal during peak season, because the number of flies is reduced at the source instead of only being tackled on the coat.

Excellent Horse Protection Spray Lotion 2.5 l vs. Knock-Off FlyNip Refill Pack: a comparison

Which fly spray is right for your stable?

For daily turnout during peak fly season, I use the Excellent Horse Protection Spray Lotion 2.5 l, combined with the Puck Zebra Fly Mask and Airmesh Ear Protection. Together, this combination covers the skin, eyes, and ears at the same time instead of relying on a single product.

If you already use a FlyNip spray system in the stable, there is no reason not to stick with the Knock-Off FlyNip refill pack instead of switching to a new product. Ultimately, it is not the label on the bottle that makes the difference, but how consistently you keep at it.

If your horse continues to itch despite consistent spraying, first supplement with Excellent Itch Stop Futteröl Pferd from the inside instead of increasing the amount of spray. Then check whether an Insektenvernichter Halo 45 in the stable reduces the overall pressure. Start with basic protection for the horse and only then add the supplements your stable actually needs.

With this approach, you can keep fly protection under control throughout the season:

• Spray with Excellent Horse Protection spray lotion 2.5 l before every turnout and brush against the direction of hair growth
• Reapply after heavy sweating or rain
• Put on the Puck Zebra fly mask for eye and head protection during turnout or rest in the stall
• Add Airmesh ear protection or Earnet sound dampeners when there are large numbers of flies around the ears
• Use the Comfort+ fly browband while riding for additional protection around the forehead and eyes
• If itching persists despite using spray, supplement the feed with Excellent Itch Stop horse feed oil
• Use Halo 45 insect killer in the stable building to reduce the overall fly population
• If a FlyNip system is already in place, purchase the Knock-Off FlyNip refill pack instead of a new spray system