Laminitis Prevention Through Diet: A Complete Guide

Laminitis is one of the most painful and potentially devastating conditions a horse can suffer. It involves inflammation of the sensitive laminae — the tissue structures that connect the hoof wall to the pedal bone inside the hoof. In severe cases, the pedal bone can rotate or sink, leading to chronic lameness or even the heartbreaking decision to euthanise.

The good news? A significant proportion of laminitis cases are directly linked to diet and metabolic factors, which means they are preventable. By understanding how diet triggers laminitis and making informed management choices, you can dramatically reduce your horse's risk.

This guide walks you through everything you need to know about laminitis prevention through diet management — from understanding the causes to building a practical, safe feeding plan.

Understanding How Diet Triggers Laminitis

Before you can prevent diet-related laminitis, it helps to understand why certain feeds are dangerous.

The Role of Non-Structural Carbohydrates (NSC)

Non-structural carbohydrates — which include sugars, starch, and fructans — are the primary dietary villains when it comes to laminitis. When a horse consumes large amounts of NSC, one of two things can happen:

1. Hindgut overload: Excess starch and sugars that aren't digested in the small intestine pass into the hindgut. There, they ferment rapidly, producing lactic acid. This kills beneficial fibre-fermenting bacteria and causes a cascade of toxins to enter the bloodstream, ultimately disrupting blood flow to the hooves.

1. Insulin dysregulation: High-sugar and high-starch diets cause spikes in blood insulin. In horses with Equine Metabolic Syndrome (EMS) or insulin dysregulation, chronically elevated insulin directly damages the laminae, even without hindgut disturbance.

Both pathways can lead to laminitis, and for many horses — particularly overweight ones or those with metabolic conditions — the risk is very real.

Fructans in Grass: The Hidden Danger

Pasture grass is the single biggest dietary risk factor for laminitis in the UK and other temperate climates. Grasses store energy as fructans, and fructan levels fluctuate dramatically based on:

• Time of day — levels are highest in the afternoon after a sunny day
• Season — spring and autumn are peak risk periods
• Temperature — cool nights followed by sunny days cause fructan accumulation
• Stress — drought, frost, or overgrazing can spike fructan levels

Many horse owners assume that short grass is safe, but stressed, overgrazed pasture can actually contain higher concentrations of fructans than longer grass.

Identifying At-Risk Horses

Not every horse faces the same level of laminitis risk. Some horses are significantly more vulnerable, and their diets need to be managed more carefully.

High-Risk Groups

• Overweight or obese horses — excess body fat promotes insulin resistance
• Horses with Equine Metabolic Syndrome (EMS) — characterised by obesity, regional fat deposits (cresty neck, fat pads), and insulin dysregulation
• Horses or ponies with a history of laminitis — once a horse has had laminitis, they are much more likely to have another episode
• Horses with Pituitary Pars Intermedia Dysfunction (PPID/Cushing's) — this hormonal condition impairs insulin regulation
• Native breeds and ponies — breeds like Shetlands, Welsh ponies, cobs, and Morgans evolved to thrive on sparse forage, making them prone to weight gain on modern pastures

If your horse falls into any of these categories, dietary management isn't optional — it's essential.

Core Dietary Strategies for Laminitis Prevention

Now let's look at the practical steps you can take to reduce your horse's laminitis risk through diet.

1. Control Pasture Access

For at-risk horses, unrestricted grazing on lush pasture is the equivalent of an open sweet shop. Effective pasture management strategies include:

• Strip grazing — use electric fencing to limit the area of fresh grass available
• Track systems — create a track around the perimeter of the field to encourage movement while limiting grazing area
• Grazing muzzles — these can reduce grass intake by 30–80%, though they must be fitted correctly and monitored
• Timed turnout — graze early in the morning when fructan levels are lowest, and bring horses in before the afternoon
• Avoiding high-risk periods — limit or remove grazing access during spring flushes, sunny autumn days, and after frosts

For severely at-risk horses, it may be necessary to remove pasture access entirely during peak danger periods and provide soaked hay in a dry lot or bare paddock instead.

2. Choose Low-NSC Forage

Forage should form the foundation of every horse's diet — ideally making up at least 1.5% of their bodyweight per day in dry matter. But the type of forage matters enormously.

• Aim for hay with an NSC content below 10% for laminitis-prone horses. The only reliable way to know your hay's NSC content is to have it tested.
• Late-cut meadow hay tends to be lower in sugar than early-cut or ryegrass hay.
• Soaking hay for 30–60 minutes in cold water can reduce the water-soluble carbohydrate (WSC) content by up to 30–50%. Note that soaking also leaches minerals, so you may need to supplement.
• Steaming hay does not significantly reduce sugar content — it's useful for respiratory health but not for laminitis prevention.
• Haylage is not automatically safer than hay. Some haylage is very high in sugar. Always check the analysis.

Never drastically restrict forage below 1.5% of bodyweight in dry matter without veterinary guidance, as this can cause dangerous issues like gastric ulcers, stress, and even hyperlipaemia in ponies.

3. Eliminate High-Starch and High-Sugar Hard Feeds

Many commercial horse feeds — particularly cereal-based mixes, sweet feeds, and competition feeds — are loaded with starch and sugar. For laminitis-prone horses, these should be completely removed from the diet.

Feeds to avoid:

• Cereal-based mixes (those containing oats, barley, maize)
• Molassed feeds or chaff
• Treats like sugar cubes, carrots in large quantities, and bread
• High-calorie conditioning feeds

Safer alternatives:

• Low-calorie, low-starch balancers
• Unmolassed chaff (e.g., unmolassed sugar beet or straw-based chaff)
• Fibre-based feeds specifically formulated for laminitics

When choosing any commercial feed, look for products with a combined sugar and starch content below 10%. Reputable manufacturers publish this information on the bag or their website.

4. Use a Ration Balancer

When you restrict a horse's diet to manage weight and laminitis risk, you inevitably reduce their intake of essential vitamins and minerals. A good quality, low-calorie ration balancer ensures your horse isn't missing out on crucial nutrients like:

• Zinc and copper — vital for hoof integrity and immune function
• Magnesium — plays a role in insulin sensitivity and may support metabolic health
• Vitamin E — an important antioxidant, especially for horses without access to fresh pasture
• Biotin — supports hoof wall quality

A balancer adds minimal calories while filling nutritional gaps. It's one of the simplest and most effective additions to a laminitis prevention diet.

5. Manage Weight Proactively

Obesity is one of the strongest risk factors for laminitis. Carrying excess weight promotes insulin resistance, which in turn increases the likelihood of insulin-driven laminitis.

Practical weight management tips:

• Body condition score your horse regularly — aim for a score of 4.5–5 out of 9 (or 2.5–3 out of 5 on the UK scale)
• Use a weight tape fortnightly and record the results to track trends
• Reduce total calorie intake gradually — sudden severe restriction is dangerous, especially in ponies
• Increase exercise where possible — even regular walking in-hand helps burn calories and improve insulin sensitivity
• Use small-holed hay nets or multiple nets to slow forage consumption and extend eating time

Weight loss should be slow and steady — aim for no more than 0.5–1% of bodyweight per week.

Building a Laminitis-Safe Feeding Plan

Putting it all together, here's what a typical daily diet might look like for a laminitis-prone 500kg horse or pony:

Every horse is different, and the ideal diet depends on your horse's weight, workload, metabolic status, and forage quality. Analysing your horse's diet with a tool like MyEquiBalance can help you identify nutritional gaps and ensure that your restricted feeding plan still meets all essential nutrient requirements.

Seasonal Considerations

Laminitis risk isn't static — it changes throughout the year, and your management should adapt accordingly.

Spring (March–May)

This is the highest-risk period. Rapidly growing grass is loaded with sugars and fructans. Restrict grazing aggressively, use muzzles, and monitor body condition closely.

Summer (June–August)

Risk can remain high during sunny weather. Drought-stressed grass can have elevated sugar levels. Don't assume brown or short grass is safe.

Autumn (September–November)

A secondary peak in grass growth and fructan content occurs. Cool nights and sunny days are a dangerous combination. Stay vigilant.

Winter (December–February)

Generally the lowest-risk period for pasture-related laminitis, but frosty grass in the morning can be high in fructans. This is also a good time to promote gradual weight loss before the next spring.

Working With Your Vet and Nutritionist

Diet management is the cornerstone of laminitis prevention, but it works best as part of a broader health plan:

• Ask your vet to test for EMS and PPID, especially if your horse is overweight, has a cresty neck, or has had previous laminitis episodes. Blood tests for insulin and ACTH levels can identify metabolic issues before they cause a crisis.
• Get your hay tested — you cannot assess sugar content by look, smell, or feel.
• Consult an equine nutritionist if you're unsure about balancing a restricted diet. Getting professional input can prevent both nutritional deficiencies and accidental overfeeding.

Common Mistakes to Avoid

Even well-meaning horse owners sometimes make errors that increase laminitis risk:

• Assuming ponies don't need a controlled diet because they're not in hard work — workload is irrelevant if the horse is metabolically compromised
• Feeding "a handful of mix" for energy or condition — even small amounts of high-starch feed can spike insulin in sensitive horses
• Relying on exercise alone to manage weight — you cannot outrun a bad diet, and laminitic horses often can't exercise comfortably
• Ignoring autumn risk — many owners relax management after summer, right when a second wave of laminitis cases hits
• Thinking soaking hay makes it completely safe — soaking reduces sugar but doesn't eliminate it. Testing is still important.

Final Thoughts

Laminitis prevention through diet management isn't complicated, but it does require commitment, consistency, and attention to detail. The fundamental principles are clear: control sugar and starch intake, manage pasture access, maintain a healthy body weight, and ensure essential nutrients are still provided despite dietary restrictions.

The effort is absolutely worth it. A well-managed diet can keep a laminitis-prone horse comfortable, sound, and healthy for many years. The alternative — dealing with an acute laminitis episode — is painful for your horse, stressful for you, and expensive to treat.

Start today. Assess your horse's body condition, review what's in their feed bucket, consider their pasture situation, and make the changes that could save their hooves — and their life.