Is Your Horse “Bombproof” or Just Shut Down?

A horse who isn’t reacting may not be relaxed, they may be shut down and quietly enduring torture.

We’ve all admired the “bombproof” horse - the one who doesn’t flinch at flags, tarps, traffic, or chaos. But what if that calm exterior isn’t confidence? What if it’s resignation? There’s a growing awareness in equine behavioural science that many horses labeled as “quiet” or “safe” may actually be in a state of learned helplessness - a horrible psychological condition where the horse has stopped trying to respond or escape because it’s learned that nothing it does makes a difference. To the untrained eye, this kind of stillness can look like calm cooperation. But a horse who isn’t reacting may not be relaxed - they may be emotionally shut down, and quietly enduring torture.

Sacking Out

“Sacking out” is one of those equestrian terms that’s been passed down through

generations, often without much scrutiny. It typically refers to exposing a horse to a frightening object - like a tarp, flag, or plastic bag - until the horse stops reacting. The goal? Desensitisation. When the horse appears calm in the presence of the stimulus, many trainers interpret the horse’s stillness as success. But what is actually going on? Modern behavioural science invites us to look deeper.

The Experiment That Changed Everything

The term learned helplessness was coined in the 1960s by psychologists Martin Seligman and Steven Maier. In their heartbreaking experiments, dogs were exposed to electric shocks they couldn’t escape. At first, they tried to flee. But after repeated failures, they stopped trying - even when escape became possible. They had learned that their actions didn’t matter, and simply endured the electrocution.

This concept has since been extended to other animals, including humans - and horses. When horses are repeatedly exposed to aversive stimuli - harsh training, confinement, unpredictable environments - without the ability to avoid or control them, they may stop reacting altogether. They appear calm. But inside, they’re shut down. Much like a trauma survivor who appears composed but has numbed themselves to cope with overwhelm, some horses learn to suppress their responses not because they feel safe, but because they’ve stopped believing their reactions matter. While it can look like calm or obedience, it’s actually a sign of distress.

If you’ve unknowingly trained your horse into this state, you’re not alone. Many of us were taught to value compliance over curiosity. But once you see the difference, it’s hard to unsee - and that’s something to be proud of, not ashamed of. Because knowing better isn’t about guilt. It’s about growth.

Desensitisation vs. Flooding

This is where training methods matter. Desensitisation is on the lips of many trainers and riders around the world. Done right, it is a gradual, respectful process. It involves exposing the horse to a stimulus in small doses, allowing them to process, retreat, and re-engage. It builds trust and curiosity. Flooding, on the other hand, overwhelms the horse with a stimulus until they stop reacting. It’s often mistaken for desensitisation, but it’s fundamentally different: flooding removes choice. It forces submission. And it can lead directly to learned helplessness. Examples of flooding include:

• Lunging a horse in a saddle until they stop bucking.

• Tying "scary" objects to a saddle or bridle until the horse “gets over it.”

• Holding a horse’s head until they accept oral medication.

These methods may produce a quiet horse, but not a confident one.

Flooding can lead to:

• Elevated cortisol levels

• Shutdown responses

• Long-term sensitivity or reactivity

A human example

To understand this better, let's imagine someone who’s terrified of spiders. When presented with a spider they may scream, flinch, try to run - natural responses to fear. But if spiders are repeatedly placed on them and they’re prevented from escaping or protesting, something shifts. Eventually, they stop reacting. And that’s when the spiders are removed. To an outsider, it might look like they’ve conquered their fear. But inside they’ve simply shut down. They've gone to their "happy place" inside their mind somewhere, much like a gazelle when it's been caught by a lion. They’ve learned that no matter what they do, it won’t change the outcome - so they stop trying. That’s learned helplessness: not calm, not courage, but a kind of emotional paralysis. Horses can enter this same state when exposed to (what they perceive as) worrying stimuli without the freedom to choose or retreat.

How to Spot Learned Helplessness

A horse that appears “quiet” may be emotionally frozen. A horse in a state of learned helplessness may:

• Show flat, unblinking eyes with a fixed gaze

• Exhibit a lack of curiosity or engagement

• Fail to respond to stimuli that would normally provoke a reaction

• Appear “easy” but lack spark, initiative, or emotional expression

This isn’t relaxation. It’s shutdown.

True relaxation shows up in:

• Soft eyes

• Licking and chewing

• Steady, regular breathing

• Voluntary movement

• Engagement with the environment

The danger of Learned Helplessness / SHutdown

A horse in a state of learned helplessness or shutdown may seem like the ideal partner - quiet, compliant, unfazed by chaos - but beneath that stillness lies a dangerous fragility. When an animal has stopped reacting not because they feel safe, but because they’ve given up, their ability to process new stimuli, make decisions, or self-regulate is compromised. This emotional shutdown can mask deep distress, and when pressure builds or circumstances change, these horses may "suddenly" explode or disengage entirely, leaving handlers confused and at risk. Worse still, it erodes the horse’s sense of agency, making recovery harder and trust more elusive.

True safety comes from confidence, not suppression.

How to Build True Bravery

If you want a horse who’s genuinely brave - not just compliant - you need to build their trust in you. A horse who trusts you will follow your lead in any situation. Forcing something they fear into their space or onto them doesn't build trust. If our goal is trust - not just tolerance - then we need methods that honour the horse’s emotional experience. Here are three science-backed alternatives:

• Choice and control: Let your horse retreat, explore, and re-approach. Never trap them with stimuli. In their natural environment, horses explore and are usually very inquisitive. They just take their time about going up to something scary. Let them explore and investigate in the way that they naturally do, rather than force them on human terms and timelines.

• Progressive exposure: Introduce new things slowly, in manageable doses. Introduce "scary" objects from afar first and allow the horse to determine when it is comfortable enough to move closer. Remove or distance the object if the horse shows any kind of discomfort.

• Positive reinforcement: Reward curiosity, not just compliance. If the horse so much as looks in the direction of the thing it finds scary, reward it by removing the object or giving the horse a treat. Gradually progress what behaviour is rewarded - e.g. when the horse takes a step in the direction of the object (and eventually goes up to it).

These methods build confidence, agency, and true emotional resilience.

The Invitation

Many of us were taught to value “quiet” horses without understanding what that quiet might mean. But science is evolving, and so can we. Next time your horse stands still while the tarp flaps, ask: Is he curious? Or has he given up? Because true bravery isn’t the absence of reaction. It’s the presence of choice.

Understanding the difference between a truly relaxed horse and one who’s emotionally shut down isn’t always obvious, especially when traditional training has normalized suppression as “good behaviour.” If you’d like help spotting the signs, shifting your approach, or simply exploring what this means for your own horse, I’d love to support you. Reach out anytime. This work isn’t about perfection - it’s about awareness, compassion, and the courage to do better once we know better.

Love and light,

Vicci

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