❄️Your Horse's Incredible Winter Coat & What is Piloerection?
- Natural Horse NZ
- Jul 3
- 3 min read
Updated: Jul 7
❓ Did you know your horse is capable of having thousands of erections every winter?
😳 Before you think I’ve completely lost the plot… I’m not talking about anything rude! 🤣
I’m talking about piloerection!
🐴 So, what is piloerection?
Piloerection is the term we use to describe when the hairs within your horse’s coat stand on end as a natural adaptation to help keep them warm during winter.
That’s what makes our horses look fluffy and fuzzy at this time of year, almost like they’ve had a minor electric shock! ⚡😂
🦣 At the moment, my herd look more like a bunch of woolly mammoths than horses… and I’m guessing yours probably do too.
🤔 So what’s actually going on beneath all that fluff?
😍 This is the bit that absolutely amazes me.
Every single hair within your horse’s coat is attached to a tiny muscle. When the weather turns cold, those muscles contract, causing each hair to stand upright. As this happens, a layer of still air becomes trapped between the hairs.
Now how good is that❤️❤️❤️
☁️ Think of it like wrapping your horse in a blanket of Pink Batts insulation.
It isn’t actually the hair that’s doing all the hard work… it’s the trapped air. That insulating layer slows the loss of body heat, helping your horse stay warm through winter.
🤎 Once you understand how insulation works, you start seeing it everywhere. Over the years I’ve noticed that some of my thinner-skinned horses seem much more inclined to cover themselves in mud during winter. Once it dries, that mud can provide another insulating layer over the coat. Yet another reminder that horses are often a lot cleverer than we give them credit for.
🌧️ The catch…
Mother Nature did a remarkable job designing the horse’s winter coat. But every adaptation has its limits, and unfortunately that limit is when it gets wet.
Once soaked, the hairs become heavy and collapse, squeezing out that insulating layer of air. Throw in a cold winter wind and body heat disappears even faster.
🌳 So where do we fit into all of this?
We can help this process by helping your horse to protect the insulation.
That’s why providing some type of shelter can help enormously. Whether that’s a single tree, a hedge, a simple windbreak made from a couple of posts and some windbreak cloth, or even a basic four-post shelter can all make a remarkable difference by helping to keep the coat dry and allowing that natural insulation to keep working.
😂 Fortunately, horses aren’t too fussy. They don’t care whether they’re standing under a million-dollar stable, a basic four-post shelter or a hedge. And if they do need a rug, they certainly won’t care whether it cost $400 or $70 in the sale… as long as it is waterproof is what’s important.
So if shelter isn’t available, or if your horse is elderly, a poor doer, underweight, unwell or simply finding winter a bit harder than usual, don’t hesitate to put on a lightweight waterproof rug.
🌿 The goal isn’t to replace nature… it’s to support it.
🌡️ Like everything with horses, it’s about balance.
A horse that’s too warm may start to sweat beneath a rug, leaving the coat damp and reducing its insulating ability. Every horse is an individual, so it’s always worth looking at the horse in front of you rather than following a one-size-fits-all rule.
❤️ One final thought…
The next time you run your fingers through your horse’s thick, fluffy winter coat, just stop for a moment and think about what’s happening beneath your fingertips.
The more I learn about horses, the more I’m left in absolute awe of their ability to thrive in all conditions. And even more so when we give them a helping hand to do so in our domestic environments. ❤️🐴❤️🐴❤️🐴
❄️ Continue the Equine Winter Wonders Series
Don't stop here! Discover the fascinating ways horses survive and thrive through winter.
❄️ Horse's Incredible Winter Breathing
❄️ Heat Exchangers in the Horse Legs
❄️ Why Hay Keeps Horses Warm
❄️ Why Cells in Your Horse's Eye Trigger Winter Coat Growth
View the complete Winter Wonders Series →
