3 Smart Saddle Pad Strategies for Your Growing Horse

We’ve all been there. You invest in a beautiful saddle for your promising young horse. It fits like a dream, the sweat patterns are perfect, and your horse is moving freely.

Then, six months of good nutrition and correct work later, something’s off. The saddle that was once perfect now pinches, sits too low in front, or starts to rock.

It’s a frustrating—and all-too-common—dilemma. A young horse’s back is a work in progress. Expecting a single saddle to fit perfectly from age three to seven is like expecting a child to wear the same pair of shoes for four years. It’s simply not going to happen.

But what’s the solution? Constantly buying new saddles is unsustainable, and frequent flocking adjustments can be costly. This is where a strategic approach to saddle padding comes in—not as a permanent fix for a bad fit, but as an intelligent, temporary tool to manage change.

Why a Growing Horse’s Back is a Moving Target

A young horse’s body undergoes a dramatic transformation. As they build strength and fitness, their entire shape evolves. Key areas to watch include:

• The Topline: The longissimus dorsi muscles along the spine are often underdeveloped in a young horse. With correct training, these muscles grow, lifting and widening the area where the saddle sits.

• The Withers: A young horse may start with low, rounded withers that become more prominent and defined with age and muscle development.

• The Shoulders: As the sling muscles supporting the chest and shoulders strengthen, the horse’s entire front-end conformation can shift.

This constant state of flux is what makes maintaining the delicate balance of saddle fit so challenging. The goal isn’t to find one ‘forever’ solution right away, but to support your horse comfortably through each stage of development.

The Shimmable Pad: Your Temporary Toolkit

Enter the shimmable saddle pad. Think of it not as a crutch for a poorly fitting saddle, but as an adaptive layer—a temporary, diagnostic tool that lets you make micro-adjustments in response to your horse’s changing body.

These pads feature built-in pockets—typically at the front, middle, and rear—that allow you to insert foam or felt ‘shims’ of varying thicknesses. By adding or removing these shims, you can subtly alter how the saddle sits on the back, bridging the gap between professional fitting appointments.

But this isn’t just guesswork. A 2022 study in the Journal of Equine Veterinary Science confirmed that shims significantly alter a saddle’s pressure distribution. The study showed that while correctly placed shims can effectively reduce high-pressure points, incorrectly placed ones can make the fit worse by creating new areas of intense pressure.

This underscores a crucial point: shimming is a science. The goal is not just to ‘fill a gap,’ but to rebalance the entire system of saddle, rider, and horse.

How to Use Shims as a Diagnostic Tool

When used thoughtfully, shims can help you manage common developmental phases. Always start with a saddle fitted correctly to your horse’s current shape, and then use shims to accommodate the small changes that happen between fittings.

Here are a few common scenarios:

Scenario 1: Developing Wither Hollows

As young horses build muscle, they often develop hollows behind the withers before the rest of their topline fills in. This can cause the saddle to dip forward and put pressure on the withers.

• The Strategy: Use front shims to lift the pommel, providing clearance for the withers and helping rebalance the saddle.

• The Caveat: The 2022 study found that shimming the front can tilt the saddle backward, increasing pressure under the cantle. Check to ensure you haven’t simply traded one problem for another. The goal is evenness.

Scenario 2: Muscle Asymmetry

Like people, horses are rarely perfectly symmetrical. One shoulder may be larger or more developed than the other, causing the saddle to shift toward the weaker side.

• The Strategy: Place a shim only on the less-developed side. For example, if the left shoulder is smaller, a shim in the front-left pocket can help balance the saddle and provide more freedom of movement for the horse’s shoulders.

• The Caveat: This should be a temporary measure. Your long-term focus should be on gymnastic exercises to build symmetrical muscle.

Scenario 3: The ‘Downhill’ Build

Many young horses have a croup that is higher than their withers. This ‘downhill’ build can tip the rider forward into an unbalanced seat.

• The Strategy: Front shims can lift the front of the saddle, helping to level the seat and improve the saddle’s support for the rider.

• The Caveat: Remember that this accommodates a developmental stage. The long-term goal is to strengthen the horse’s back and core so they learn to lift their forehand naturally.

After every ride with a new shim configuration, check the sweat patterns on your horse’s back. They’re an excellent indicator of pressure. You’re looking for even, symmetrical moisture, not dry spots (which can signal intense pressure) or ruffled hair.

When Shims Are Not the Answer

It’s critical to understand the limits of a shimmable pad. Shims are for fine-tuning, not for fixing a fundamental mismatch. A pad cannot solve these core problems:

• The Tree is Too Narrow: This will pinch the horse’s shoulders and withers, and no amount of padding can fix it.

• The Tree is Too Wide: The saddle will collapse onto the withers, causing pain. While a pad might lift it temporarily, it often creates dangerous instability.

• The Channel is Too Narrow: A narrow gullet will put direct pressure on the horse’s spine and ligaments.

• The Panels are the Wrong Shape: If your saddle bridges (making contact only at the front and back), adding middle shims can create concentrated pressure points.

If you notice any of these signs of poor saddle fit, it’s time to stop and reassess the saddle itself. A pad is not a substitute for a properly shaped and sized saddle.

The Long-Term Goal: A Saddle That Adapts With You

Using shims is an excellent short-term strategy, but the ultimate goal is a saddle that offers foundational stability and comfort. The knowledge you gain from using shims—understanding where your horse needs support and where they are changing—is invaluable data to share with your saddle fitter.

This process underscores the value of saddles designed with adaptability in mind. Innovations like adjustable trees and specialized panel designs, such as the Iberosattel Comfort Panel, are born from this very challenge: creating a saddle that can work with a horse’s changing body, minimizing the need for excessive padding.

By staying observant and using tools like shimmable pads wisely, you become an active participant in your horse’s comfort. You’re not just a rider; you’re a key part of their development team.

Frequently Asked Questions

How do I know if the shims are working correctly?

Watch your horse’s reaction under saddle: are they moving more freely? Check your sweat patterns after a ride for evenness. Your own balance is also a clue; if you feel more centered and secure, that’s a good sign.

Can I stack multiple shims in one pocket?

It’s generally not recommended. Stacking shims can create a lumpy surface and sharp pressure points. If you need that much of an adjustment, it’s a strong indicator that you need an expert saddle fitting consultation.

How often should I re-evaluate the fit on my young horse?

With a horse in consistent work, their back can change noticeably in as little as four to six weeks. Check the fit regularly, and be prepared to add, remove, or change your shims as their musculature develops.

Is a shimmable pad a replacement for a professional saddle fitter?

Absolutely not. A shimmable pad is a tool to be used between professional fittings. Always start with a saddle that has been approved by a qualified fitter, and use their guidance to manage the small changes that happen over time.