Low Sugar Hay for Horses What Canadian Owners Should Know

If you own a horse with laminitis, insulin resistance, metabolic syndrome, or an easy keeper that seems to gain weight just looking at a hay bale you've probably heard the term low sugar hay come up in conversation with your vet or farrier. But what does it actually mean? How do you find it? And how do you know if your hay actually qualifies?

This guide covers everything Canadian horse owners need to know about low sugar hay for horses from understanding NSC and sugar content to soaking hay, choosing the right cut, and knowing when to test. Whether your horse has been formally diagnosed with a metabolic condition or you simply want to feed smarter, this is your complete reference.

What Is Low Sugar Hay?

Low-sugar hay is forage that contains a reduced level of water-soluble carbohydrates the sugars and starches that spike blood glucose and insulin when digested.

The term is often used interchangeably with "low NSC hay," which refers to the total Non-Structural Carbohydrate content of the hay.

Not all hay is created equal when it comes to sugar content. Hay that looks green and healthy can still be dangerously high in sugars for sensitive horses. Conversely, pale or coarse-looking hay is not automatically low in sugar.

The only way to know for sure is through laboratory testing something we'll cover in detail later in this guide.

For horses that don't have metabolic issues, sugar levels in hay are generally not a concern.

But for a significant percentage of horses particularly those in middle age or older low sugar hay for horses can make the difference between soundness and chronic lameness, healthy weight management, or a spiral of metabolic complications.

Understanding NSC Non-Structural Carbohydrates

NSC stands for Non-Structural Carbohydrates the portion of a plant that is made up of simple sugars, fructans, and starch. In practical terms, NSC is what you're measuring when you talk about the sugar load in hay.

What makes up NSC in hay:

•        Water-Soluble Carbohydrates (WSC) — simple sugars and fructans. These are absorbed quickly and have the most direct impact on blood glucose and insulin levels

•        Starch — another carbohydrate fraction that is digested in the small intestine. Starch levels in hay are typically low, but worth knowing

•        Ethanol-Soluble Carbohydrates (ESC) — a subset of WSC that most closely represents the sugars that trigger insulin response. Some equine nutritionists focus specifically on ESC + Starch as the most relevant number for insulin-resistant horses

What NSC level is considered low?

The widely accepted guideline for horses with insulin resistance, laminitis history, or PPID (Cushing's Disease) is hay with a total NSC of 10% or below on a dry matter basis. Some equine nutritionists recommend staying below 12% for horses at risk, and below 10% for horses actively managing laminitis or metabolic syndrome.

To put this in context, many common hay types  including some timothy and orchardgrass varieties can test at 12–20% NSC depending on growing conditions, cutting time, and storage. This is why what is low NSC hay is such an important question for metabolic horse owners: you genuinely cannot assume any hay is safe without testing.

Which Horses May Need Lower-Sugar Forage?

Not every horse needs hay for easy keepers or metabolic horses. But for a significant proportion of the horses kept in Alberta and across Canada, low-sugar forage is genuinely important. Here's who needs to pay close attention:

•        Horses with Equine Metabolic Syndrome (EMS) — characterized by obesity, abnormal fat deposits, and elevated insulin levels. High-NSC hay directly worsens insulin dysregulation in these horses

•        Horses with PPID (Cushing's Disease) — particularly common in horses over 15. PPID causes abnormal cortisol regulation that impacts insulin sensitivity, making low-NSC forage important

•        Laminitis-prone horses — horses with a history of laminitis are at permanent elevated risk from high-sugar forage. Low-NSC hay is a cornerstone of laminitis prevention

•        Easy keepers — horses that gain weight easily on standard feeding programs benefit from hay for easy keepers with lower caloric and sugar density

•        Ponies and miniature horses — genetically predisposed to insulin resistance and far more sensitive to high-NSC forage than most horse breeds

For these horses, hay is not just a question of nutrition it's a direct health and soundness issue. Feeding high-NSC hay to an insulin-resistant horse is comparable to feeding a diabetic person a high-sugar diet. The consequences are real, painful, and costly.

If your horse struggles with weight, has cresty neck fat deposits, or has experienced laminitis episodes, it's worth discussing low-NSC hay with your vet.

And it's worth reading our guide on the 10 best senior horse feeds for healthy weight gain many senior horses fall into this category.

Can Hay Colour Reveal Sugar Levels?

This is one of the most persistent myths in horse feeding and it needs to be addressed directly: hay colour does not reliably indicate sugar content.

Bright green hay is often assumed to be "better" or lower in sugar. In reality, green colour in hay indicates good harvesting conditions and chlorophyll preservation it tells you about the curing process, not the NSC content.

A very green, leafy timothy hay can test at 15–18% NSC if it was harvested under high-sugar conditions.

Conversely, hay that looks slightly pale or sun-bleached is not automatically high in sugar — UV exposure degrades chlorophyll without necessarily changing NSC levels significantly.

The bottom line: you cannot choose low sugar hay for horses by eye. Visual appearance tells you about moisture, mold risk, dust levels, and general harvest quality none of which are reliable proxies for NSC. Only a laboratory test can tell you what's actually in your hay.

Does Cutting Time Affect Sugar?

Yes significantly. When hay is cut in the day matters, and when in the season it's cut matters even more.

Time of Day at Harvest:

Plants accumulate sugars through photosynthesis during daylight hours and use them for growth overnight.

Hay cut in the early morning before the sun has driven much photosynthesis tends to be lower in WSC than hay cut in the afternoon.

Some hay producers specifically time morning cuts for metabolic-sensitive customers, though this is not standard practice and can't be guaranteed.

Season and Cut Number:

This is where the difference between 1st and 2nd cut timothy hay matters directly for sugar-sensitive horses:

•        1st cut hay — harvested in late spring when grasses are more mature. Generally lower in NSC than 2nd cut because the plant has used more of its stored sugars for stem development. Also higher in structural fibre, which is beneficial for hindgut health

•        2nd cut hay — softer, leafier, and higher in protein, but also tends to be higher in NSC. Not automatically unsafe, but requires testing before feeding to metabolic horses

•        Stressed or drought-affected hay — hay from fields experiencing drought or temperature stress can accumulate very high fructan levels. This is one of the most common causes of unexpected laminitis flare-ups in horses fed hay that previously seemed safe

For a detailed breakdown of 1st vs 2nd cut differences, read our blog: 5 Differences Between 1st Cut and 2nd Cut Timothy Hay.

Does Soaking Reduce Sugar?

Yes — soaking hay is one of the most practical and proven methods for reducing NSC content for horses that require soaked hay for horses with metabolic conditions.

How soaking works:

When hay is submerged in water, water-soluble carbohydrates (WSC) — including fructans and simple sugars — leach out of the hay into the water.

The water-soaking process does not remove starch, which is not water-soluble, but since most of a hay's problematic carbohydrate load for insulin-resistant horses is in the WSC fraction, soaking is highly effective.

Soaking guidelines for Canadian horse owners:

✔     Soak for 30–60 minutes in cold water — cold water soaking for 30–60 minutes can reduce WSC by 20–30% in most hay types

✔     Avoid hot water soaking — hot water removes more sugars but also leaches important minerals including calcium and potassium. Cold water soaking is the standard recommendation

✔     Drain and feed immediately — soaked hay begins fermenting within a few hours, especially in warm Alberta summer temperatures. Always feed soaked hay promptly

✔     Discard soak water — the soak water contains the leached sugars. Never use it for drinking water

✔     Don't over-rely on soaking — soaking reduces NSC but does not guarantee safe levels. If your horse's baseline hay is very high in NSC (18–20%), soaking may not bring it to a safe range. Always start with lower-NSC hay when possible

Soaking is most important for horses actively managing laminitis or during high-risk seasons (spring pasture flush, drought-stressed late summer hay).

As an alternative to soaking, consider a complete low sugar, low starch complete feed like our Hi-Pro Step 3 GenAPro a high fibre, low sugar, low starch feed that can partially or fully replace hay for sensitive horses.

Why Every Hay Batch Can Be Different

This is one of the most important concepts for metabolic horse owners to understand: the same field, the same farmer, and the same hay variety can produce dramatically different NSC levels from one cutting to the next.

Here's why hay NSC varies so much between batches:

•        Weather during growth — cloudy, cool growing periods allow sugars to accumulate without being burned for growth. Sunny, warm periods generally produce lower-NSC hay

•        Drought stress — drought causes grass to accumulate fructans as a stress response. Drought-affected hay can be dramatically higher in NSC than normal-year hay from the same field

•        Temperature at harvest — hay cut after a frost can contain dangerously elevated fructan levels. Post-frost hay is one of the most common causes of laminitis flare-ups in Canadian horses

•        Time between cut and baling — hay that cures slowly in the windrow continues photosynthesizing during daylight, potentially increasing NSC. Fast curing in dry Alberta conditions generally produces lower-NSC bales

•        Field fertilization — heavily nitrogen-fertilized grass grows quickly and accumulates more sugars than slower-growing, less fertilized grass

The practical implication: you cannot assume last year's safe hay is safe this year. And you cannot assume hay from the same farm is consistent from cutting to cutting. This is why laboratory testing is non-negotiable for horses with metabolic conditions.

Importance of Laboratory Testing

For any horse on a best hay for metabolic horses feeding program, laboratory hay analysis is not optional it's essential. Visual inspection, colour grading, and touch cannot tell you what's in your hay. Only a certified forage lab can.

What a hay analysis tells you:

•        Total NSC (WSC + Starch) — the critical number for metabolic horses. Target below 10–12% for insulin-resistant horses

•        ESC (Ethanol-Soluble Carbohydrates) — the most insulin-stimulating sugar fraction. Some vets recommend targeting ESC + Starch below 10% specifically

•        Protein % — important for horse type matching. Refer to our Step Right feeding guide for how protein needs vary by horse type

•        Digestible Energy (DE) — caloric density. Critical for easy keepers and horses needing to gain or lose weight

•        Calcium and Phosphorus — Ca:P ratio affects bone health and metabolic function

•        Moisture % — anything above 15–17% increases mold risk; below 12% is the international export standard

At Horse Creek Hay & Feed, every bale we sell comes with a full nutritional analysis the same testing standard international hay export buyers require.

You receive the exact NSC, protein, energy, and moisture values for your specific batch of hay not an average or a guess. This is one of the most important things that separates our hay collection from a standard local hay purchase.

To understand more about how we source and test our hay — and why Alberta's climate produces naturally cleaner forage

Read: Why Alberta Climate Produces High-Quality Export Hay

Choosing Hay for Overweight and Metabolic Horses

With all of the above in mind, here's a practical guide for choosing the right best hay for metabolic horses and easy keepers in Alberta:

Step 1 — Always Request a Hay Analysis

Never buy hay for a metabolic horse without seeing the NSC numbers. Ask your supplier for the lab analysis before purchasing. At Horse Creek, we provide this with every sale as standard practice.

Step 2 — Target Total NSC Below 10–12%

For horses with active insulin resistance or laminitis history, aim for total NSC below 10%. For horses at risk but not actively symptomatic, below 12% is a reasonable target. For easy keepers without diagnosed metabolic issues, below 15% is generally acceptable.

Step 3 — Consider 1st Cut Timothy as Your Default

For the majority of metabolic and easy-keeper horses in Alberta, 1st cut timothy hay is the best starting point. It's lower in NSC than 2nd cut, higher in structural fibre, and lower in caloric density — helping easy keepers maintain appropriate weight without excessive restriction.

Step 4 — Soak If NSC Is Borderline

If your tested hay comes in at 12–15% NSC and your horse is insulin-resistant, cold-water soaking for 30–60 minutes before feeding brings it into a safer range for most horses. Always drain completely and feed promptly.

Step 5 — Use a Low-NSC Complete Feed as a Supplement

When hay alone isn't providing complete nutrition — especially for metabolic seniors — pair it with a low-NSC complete feed. Our top picks for metabolic horses at Horse Creek:

•        Hi-Pro Step 8 – Hi-Fat Cool Energy — vacuum-infused, very low NSC, high fat from canola oil, flax, and rice bran. Purpose-built for metabolically challenged horses

•        Hi-Pro Step 3 – GenAPro — high fibre, low sugar, low starch complete feed. Can replace hay partially or fully for horses needing controlled NSC intake

•        Hi-Pro Step 7 – Ration Balancer — low-calorie mineral and vitamin balancer for easy keepers eating good-quality hay who just need nutritional top-up without added calories

•        Summit Forage Timothy/Alfalfa Cubes — clean, consistent cubes for horses who need controlled forage with good fibre and palatability

Step 6 — Monitor Body Condition Score Continuously

Even on a well-designed low-NSC feeding program, body condition must be monitored consistently. Aim for a Henneke Body Condition Score of 4–5 for easy keepers and metabolic horses. Don't wait for visible rib or hip bone changes — get your hands on your horse weekly, especially through Alberta winters when long hair can mask significant weight changes.

For a complete guide on how much hay to feed based on body condition and horse type, Read: How Much Hay Does a Horse Eat in a Day? Alberta Owner's Guide.

 Low-Sugar Hay & Feed Options at Horse Creek

Product	NSC Level	Best For
1st Cut Timothy Hay	Lower (test each batch)	Easy keepers, metabolic horses, IR horses
Hi-Pro Step 8 Hi-Fat Cool Energy	Very Low	Insulin resistance, laminitis, metabolic horses
Hi-Pro Step 3 GenAPro	Low	Hay replacer for sensitive/metabolic horses
Hi-Pro Step 7 Ration Balancer	Very Low	Easy keepers needing vitamin/mineral top-up
Summit Forage Timothy/Alfalfa Cubes	Moderate (test)	Consistent controlled forage option
Soaked Hay (any variety)	Reduced 20-30%	Metabolic horses when hay NSC is borderline

 

Analyzed Low-Sugar Hay in Alberta

Feeding low sugar hay for horses correctly starts with knowing what's actually in your hay not guessing based on colour or cut. At Horse Creek Hay & Feed in Rocky View County, every bale we sell comes with a full nutritional analysis including NSC, protein, energy, and moisture values. 

Our Alberta-grown timothy and timothy/alfalfa mix hay is tested to the same standards international export buyers require because we believe your horse deserves nothing less.

Whether your horse is managing insulin resistance, recovering from laminitis, or is simply an easy keeper you want to feed correctly, we're here to help you find the right hay and the right feed program.