Immune System · Seasonal Protection

Fly terror on the horse's head – what's really behind it

Flies and biting midges transmit bacteria daily directly to your horse's eyes, ears, and mucous membranes. The immune system reacts immediately and becomes progressively weakened. This happens silently and invisibly throughout the summer, until watery eyes turn into inflammations and a summer problem becomes a burden that begins earlier each year.

Consequently, more and more horse owners are opting for daily immune system support.

Get Immune Active now →
Free fly mask included · While stocks last

Delivery in 1–3 days · Made in Germany

Horse in a pasture with Immune Active
Do you recognize this in your horse?

Recognize warning signs early

Watery or sticky eyes

Especially in summer, the eye defends itself daily against incoming pathogens by increasing tear production.

Reddened or sore ears

Black fly bites that don't heal properly or return every season.

Restlessness in the pasture

Constant avoidance and an inability to graze peacefully are continuous triggers that activate the stress system.

Earlier and more each year

Symptoms that become more intense or start earlier each season – a sign of decreasing sensitivity.

These signs may indicate seasonal immune stress, but can also have other causes. Immune Active is a Complementary feed – not a medicine. If symptoms persist or worsen, please always consult a veterinarian.

Why this isn't enough

More and more horses are wearing fly masks. That's good – but it's not enough.

It's a positive trend: most horses now wear a fly mask in the pasture. No insect can get through the mesh – as long as the mask stays on. However, no horse wears it 24 hours a day. They don't wear it at night in the pasture, while riding, or in the stable. This means that every day there are hours when the eyes and ears are completely exposed to direct contact with pathogens.

What Happens During Unprotected Hours

A fly mask provides mechanical protection wherever and whenever it is worn. However, it does not fundamentally solve the underlying problem – the simultaneous exhaustion of the immune system caused by the same irritant. This requires internal preparation.

  • Mask in the pasture but not at night
  • Wearing a mask while grazing but not when riding
  • Protects the outside but not the immune system
  • Reduces Input but don't eliminate it
A horse wearing a fly mask in the pasture

A complete answer requires both sides simultaneously.

Reduce pathogen contact from the outside – and prepare the immune system from within so it can handle the contact that still occurs daily.

Understanding the Mechanism

What happens if the immune system is unprepared

Flies and biting midges trigger a biological chain reaction – quietly, without a clear warning, until its effects become visible.

Daily — is underestimated

Daily exposure to pathogens on eyes and ears

Houseflies feed on eye secretions, directly transferring bacteria to the conjunctiva. Blackflies sting ears in swarms, leaving open sores. The immune system reacts immediately by activating defense cells and stabilizing mucous membranes. This process consumes resources daily.

At the same time — the invisible tipping point

Depleted barrier – Cortisol rises

The same stimulus that challenges the immune system simultaneously activates the stress system. Cortisol levels rise, and free radicals increase – actively inhibiting immune function. The system is battling on two fronts: an increased workload on one side and reduced capacity on the other. The stimulus threshold quietly and continuously lowers.

Consequence — the body suffers losses from both sides

Small irritations can lead to inflammation.

What the immune system could easily fend off at the start of the season now turns into inflammation – not because there are more flies, but because the system is exhausted. Weeping eyes become pus-filled, ear sores don't heal, and symptoms worsen each season.

As soon as inflammation is present, a veterinarian must be consulted immediately to prevent chronic issues. In most cases, medication is prescribed – and many medications further weaken the immune system. This cycle then repeats, often starting earlier the next season.

Note: Immune Active is a Complementary feed – not a medicine and not a substitute for veterinary treatment. It provides preventative support for the immune system during seasonal challenges.

The tried and tested summer combination 2026

Support the immune system & directly repel flies

Internal support for the immune system combined with external protection against flies and midges.

Fly mask with ear protection

Stop insects before they reach eyes & ears

A fine-mesh net that sits directly in front of the eyes and ears, keeping flies and midges away – before they can make contact with the most sensitive mucous membranes. No active ingredients, no side effects. It's simply a physical solution.

  • Keeps flies away from your eyes
  • Protects ears from black fly bites
  • Suitable for pasture and barn use
  • Available in Warmblood & COB
  • Comfortable & easy to apply
  • Free with Immune Active
Horse wearing an Alpurial fly mask and insect repellent

Free with Immune Active

Available in either Warmblood or COB

The fly mask filters from the outside – Immune Active supports from within. Together, they cover both sides of the daily seasonal strain.

Immune Active

Prepare the immune system from within

The most important active ingredients – and what they achieve in the context of daily seasonal demands.

Alpurial Immune Active for Horses
Cistus extract
Protects mucous membranes at the entry point – it's antiviral and antibacterial, right where flies attack.
100,000 mg/L
Echinacea Tincture
Activates immune cells. Polysaccharides block viruses from entering the body's cells.
Immune Activation
Colostrum
Natural immunoglobulins – the way nature itself provides immune protection.
Passive Defense
Turmeric Root
Neutralizes free radicals caused by insect stress. Inhibits inflammatory processes at the cellular level.
Anti-Stress
Propolis
Naturally antibacterial and antiviral. Strengthens the mucosal barrier in areas subject to daily irritation.
Barrier
Vitamins A, D3, E, B complex, and biotin
Mucosal integrity, immunomodulation, antioxidant protection, and energy supply—rarely so comprehensive.
11 Vitamins

In liquid form, all active ingredients are optimally absorbed—more efficiently than in powder formulations. Administered directly with the feed.

Easy to Feed
How it Works

Liquid Supplements can be added to any feed and are generally accepted more readily by most horses than powders or pellets.

  1. Shake bottle & measure dose
  2. Distribute evenly over the feed
  3. Feed it to your horse & see how much they enjoy it
Frequently Asked Questions

Your Questions – Our Answers

When should I start feeding - only when symptoms appear?

Start 1–2 weeks before the insect season begins, which is typically from April depending on your region. The immune system needs time to prepare. If you wait until visible signs appear, it's already too late, as the internal burden will have already started.

Why do I receive the fly mask for free with my order, and not as a separate item?

Because together, they provide the complete answer to seasonal challenges. The mask reduces daily exposure to pathogens from the outside. Immune Active prepares the immune system from within. Separately, each is only a partial solution – but together, they cover both sides.

What mask size is right for my horse - warmblood or COB?

The Warmblood size is suitable for large horses and warmbloods. The COB size is suitable for Haflingers, Cobs, and medium-sized horses. If you are unsure, please contact us before ordering – we'll be happy to help you choose.

How do you give Immune Active, and does the horse like the taste?

Immune Active is liquid and can be given directly with the feed – simple and effortless. Most horses readily accept it. Should your horse refuse it: you have a 30-day Taste Guarantee – a full refund, with no small print.

How long does one bottle last – and how long should I feed it?

One bottle lasts 33 days when given at 30 ml daily, or 50 days at 20 ml daily. It is recommended to feed at least one bottle without interruption. Many horse owners feed it throughout the entire insect season, as the product is suitable for continuous feeding.

Can I combine Immune Active with existing Complementary feed?

Generally, yes. Please keep in mind the recommended daily amounts of all vitamin sources combined to avoid oversupply. If in doubt, consult your vet or feed consultant.

Is this bundle also suitable if my horse already has a fly mask?

Yes – you receive a high-quality mask with ear protection as a free bonus. This can serve either as a replacement or as a second mask. The core value of the bundle, however, is Immune Active: the internal preparation that no mask in the world can provide.

Act now – before the season

Your horse's immune system is challenged daily. Is it prepared?

The fly mask filters from the outside. Immune Active provides support from within. Together, they cover both aspects of seasonal challenges – before they become apparent.

Get Immune Active now →
Free fly mask included · While stocks last
30-Day Taste Guarantee Made in Germany Delivery in 1–3 days