The Winter Rug Debate

To Rug or Not to Rug in Winter?

Winter rugging is one of the most debated topics in horse care.

Much like the summer rugging discussion, opinions on winter rugging are often shaped by personal experience, climate, management practices and the individual horse. Some horse owners reach for a rug at the first sign of a chilly morning, while others believe horses are perfectly capable of managing winter weather without any assistance.

As with most horse management decisions, there is rarely a one-size-fits-all answer.

The most important thing is understanding why we rug, when we rug, and whether the rugging choices we're making are actually benefiting our horses.

Horses Are Designed for Winter

One of the biggest misconceptions about winter rugging is that horses feel the cold in the same way humans do.

In reality, horses are remarkably well adapted to cooler weather. Their winter coat is an incredible piece of natural engineering. As temperatures drop, the hairs stand upright, trapping a layer of warm air close to the skin. Natural oils in the coat help repel rain and moisture, while movement and constant grazing generate additional body heat.

Research suggests that many healthy horses don't begin to genuinely struggle with cold temperatures until they drop to around 5°C or below, particularly when combined with wind and rain.

This doesn't mean all horses should go unrugged throughout winter. It simply means that before reaching for another rug, we should consider whether the horse actually needs it.

The Risks of Over-Rugging

Most owners who over-rug do so with the very best intentions. We care about our horses and don't want them to be cold.

However, excessive rugging can create its own problems.

When a horse is rugged too heavily, their natural insulation system is suppressed. The coat can no longer lift and trap warm air effectively, and excess body heat becomes trapped beneath the rug. The result can be sweating under the rug, even when the weather feels cold to us.

That warm, damp environment creates ideal conditions for skin irritation, bacterial infections and fungal problems. Long-term over-rugging may also interfere with normal weight regulation.

A horse that is too warm is often less comfortable than a horse that is slightly cool.

Which Horses Actually Need Winter Rugs?

While many healthy horses cope extremely well without heavy rugging, some horses genuinely benefit from additional protection.

Who genuinely needs a rug in winter:

• Horses that have been clipped
• Older horses that struggle to regulate their body temperature
• Horses with health conditions that affect weight maintenance
• Thoroughbreds, Warmbloods and other fine-coated breeds
• Horses that are underweight or have lost condition
• Horses in consistent hard work
• Horses confined to small yards or stables with limited ability to move
• Horses exposed to prolonged cold rain, wind or extreme weather

For these horses, rugging can be an important welfare tool rather than simply a management preference.

Rugging for the Weather, Not the Calendar

One of the biggest mistakes we make is rugging according to the season rather than the conditions.

A sunny winter day can be warmer than a cool autumn day. Wind chill can make 10°C feel significantly colder, while a still, sunny day at the same temperature may feel quite comfortable.

Instead of following a fixed rugging schedule, assess the actual conditions and your horse's individual needs.

As a very general guide:

• Mild conditions (10°C and above, particularly if windy) - Lightweight rug or rain sheet
• Cool conditions (5-10°C) - Medium-weight rug for horses requiring additional warmth
• Cold, wet and frosty conditions (below 5°C) - Heavyweight waterproof rug, particularly for vulnerable horses

Remember that these are only guidelines. A healthy horse with a full winter coat may require far less protection than a clipped Thoroughbred standing in a windy paddock.

How to Tell If Your Horse Is Comfortable

Rather than guessing, check your horse.

A simple method is to slide your hand under the rug behind the withers.

If the skin feels: Warm and dry - your rugging is probably appropriate; Hot or damp - your horse is likely too warm; or Cold to the touch - your horse may benefit from additional protection

Daily checks are essential because weather conditions can change quickly.

Layering Rugs: Does More Mean Better?

Layering rugs is common during winter, particularly for performance horses or horses living in colder regions.

Done correctly, layering can be a practical way to adjust warmth without needing multiple heavy rugs. It allows flexibility as temperatures rise and fall throughout the day.

However, layering also increases the risk of pressure points, rubbing and overheating.

Each layer should serve a purpose. If your horse is comfortable in a single appropriately weighted rug, adding additional layers may simply trap unnecessary heat.

The goal isn't to create the warmest possible horse. The goal is to create a comfortable horse.

The Importance of "Underwear" for Horses

When people think about layering, they often focus on the outer rug and forget about what sits directly against the horse's skin.

The layer closest to the skin is arguably the most important.

Natural fibres such as cotton and wool have been used for centuries because they are breathable, moisture-wicking and gentle on sensitive skin. These materials help regulate temperature while allowing air movement and moisture transfer.

Synthetic materials, on the other hand, often trap heat and moisture against the skin. This can create the warm, damp environment that encourages skin irritation, fungal infections and bacterial growth.

Many synthetic products also contain chemical finishes, dyes, and manufacturing residues that can irritate horses with already-sensitive skin. And at end of life, polyester, neoprene and plastic-based materials don't break down - they contribute to landfill and, when washed, release microplastics into our waterways and paddock soil.

For horses with sensitive skin, horses prone to rubbing, older horses, or horses spending extended periods rugged, a natural-fibre layer underneath can provide significant benefits.

Think of it as underwear for your horse.

Just as we choose breathable fabrics next to our own skin, the same principle applies to horses. The layer closest to the skin should support skin health, comfort and temperature regulation.

When using any form of under-rug, liner, leg protection or wraps:

• Choose breathable natural materials wherever possible
• Never apply coverings to a damp horse
• Check regularly for rubbing or moisture build-up
• Wash layers frequently to remove sweat, dirt and bacteria
• Prioritise skin health over convenience

Don't Forget the Legs

Winter rugging discussions often focus on the body, but the legs can face their own challenges.

Wet, muddy conditions increase the risk of skin irritation, mud fever and pastern dermatitis. While boots and wraps may seem like an obvious solution, prolonged use of non-breathable synthetic products can sometimes contribute to the very problems we're trying to prevent.

Protective coverings should keep mud off while still allowing airflow and moisture management.

The healthiest environment for skin is usually one that remains clean, dry and breathable.

Whatever You Choose, Don't Judge

The winter rugging debate is unlikely to be settled anytime soon.

Some owners will choose to rug. Others won't. In many cases, both approaches can be completely appropriate depending on the horse and circumstances.

Rather than focusing on whether a horse is rugged or not rugged, the better question is: "Is this horse comfortable, healthy and well managed?"

If the answer is yes, then the management decision is probably working.

Your horse's welfare should always be the priority. Different horses have different needs, and good horse owners make decisions based on those needs rather than on what everyone else is doing.

🐴 Together, making our horses' lives better – Yvette

Related HorseTalk Blogs

• Winter Horse Care
• Cotton vs Polyester – What’s Best?
• The Rugging Debate (summer rugging)

Related Resources:

• “The Science of Rugging Horses: What rug to use and when?!” -by Dr David Marlin, 30 Jun 2022 
• “Do horses need rugs in winter?” – Animal Care Australia 
• “Does your horse really need to wear a rug when it’s wet?” by Kieran O’Brien MRCVS, 4 May 2026
  

Disclaimer: These are my thoughts and opinions and should not be considered expert or veterinary advice. Every horse is an individual, and I recommend seeking professional advice regarding your horse's specific needs and circumstances.

(Photo courtesy of Roger Starnes on Unsplash)