08/09/2026
The Swiss Cheese Theory of Horse Safety🧀🐴
Did you know that horse safety, and how we improve it, can be explained with cheese?
There is a rather clever risk-management concept called the "Swiss Cheese Model", developed by psychologist James Reason to explain why accidents happen in complex systems.
Imagine several slices of Swiss cheese standing one behind another. Each slice represents a layer of protection. Unfortunately, being Swiss cheese, every layer has holes.
Most of the time this doesn't matter because the holes are in different places. A problem gets through one layer and is stopped by another.
Accidents become more likely when the holes happen to line up.
And horses are wonderfully good at demonstrating this.😆
Imagine you're riding down the road.
Your horse starts the ride fresh and vigilant. Perhaps he hasn't been out for a while. He's looking around more than usual, but nothing particularly alarming is happening.
There's our first hole.🕳
Perhaps there are also gaps in his training. His responses to your aids are reasonably reliable when he's relaxed, but become considerably less reliable when his attention shifts elsewhere. So you shorten the reins and start having a bit of an argument about keeping his head straight and slowing down.
Another hole.🕳
You can feel his tension increasing. He's not settling. You recognise the problem, but don't yet have the practical skills to reliably redirect his attention and reduce the tension. So you shorten the reins a little more and try harder.
Unfortunately, rather than reducing his tension, you're now contributing to it.🤨
Another hole.🕳
Then a dog charges out of a driveway barking.🐕
Your horse spins or bolts. You lose your balance and discover that gravity remains remarkably committed to its work.😫❤️🩹
Later, when someone asks what happened, the answer seems obvious:
"A stupid dog ran out of a driveway."😡
And yes, it did.
But the dog wasn't necessarily -THE- cause of the accident. It was the final event in a chain of vulnerabilities that happened to line up.
The horse was already fresh and vigilant. There were gaps in his responses. His tension had been increasing. The rider wasn't able to sufficiently influence what was developing and, despite trying to help, was adding to the horse's tension.😫
Then the environment supplied a barking dog at precisely the wrong moment.
The holes lined up.😕
Now imagine exactly the same dog charges out on another day.
The horse starts the ride just as fresh and vigilant. But this time his responses are better established. The rider recognises the rising tension earlier and has developed the ability to redirect his attention and help him settle without getting into a fight.
The dog still charges out.
The horse still startles, because horses are horses and barking dogs exploding from driveways are genuinely startling.
But perhaps the reaction is smaller. The rider redirects him. The horse responds, settles and they continue down the road muttering uncharitable things about the dog's owner.
➡Same dog. Different cheese.
And this is where I think the Swiss Cheese Model becomes particularly useful for horse people.
We cannot make horses completely safe.😎
They are large, powerful animals with extremely fast defensive responses. We ride them through environments we cannot completely control. Dogs bark. Motorbikes appear. Plastic bags achieve flight. Sometimes horses react to things apparently existing in dimensions unavailable to the rest of us.🤓
Risk is part of working with horses.
But risk is not necessarily fixed.
- Every time you improve your ability to recognise tension earlier, you potentially make a hole smaller.
- Every time you improve your horse's responses, another hole may become smaller.
- Every time you become better at helping your horse navigate unfamiliar situations, responding when something goes wrong, recognising when something physical isn't right, or making the decision to change the plan, you alter the cheese.
None of this makes you invincible.
Experienced horsepeople still have holes in their cheese. They make mistakes, misread situations and occasionally have moments best filed under "Well, That Was Educational"📂.
The aim isn't to eliminate every hole.
It is to have enough effective layers, with small enough holes, that one problem doesn't have an uninterrupted pathway to something much worse.
You cannot remove all the risk from horses. But you can keep reducing the opportunities for a small problem to become a serious one.
You don't need perfect cheese.
You just need to keep working on reducing the holes.❤
Collectable Advice 287/365.
Please SHARE to inspire people to identify all the way we reduce the holes and mitigate risk 😄
