
Fiber is an essential component of a horse's diet, providing up to 70% of its energy needs. Horses evolved to eat a high-fiber diet, and their digestive tracts are specifically designed to handle large amounts of fiber. The fiber in a horse's diet provides bulk to keep the gut full and healthy, helping to prevent digestive issues such as colic and maintaining a healthy gut microbiome. In this article, we will explore the benefits of a high-fiber diet for horses and provide tips on how to increase the fiber content in their diet.
| Characteristics | Values |
|---|---|
| Why fibre is important | Provides energy, supports gut health, promotes mental stimulation, and reduces the risk of stereotypic behaviours |
| Sources of fibre | Forages (hay, grass, pasture), beet pulp, soy hulls, hay cubes, complete feeds, byproducts, bran, oat hulls |
| How to add fibre | Feed more forage, choose the right quality and maturity of forage, ensure a steady supply of fermentable products, introduce new feeds gradually |
| Benefits of a high-fibre diet | Prevents colic, promotes dental health, regulates blood sugar, supports weight management, prevents dehydration |
| Drawbacks of low-fibre diet | Dehydration, diarrhoea, energy deficiency, vitamin deficiency |
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What You'll Learn

Hay, grass, and pasture are good sources of fibre
Hay, grass, and pasture are excellent sources of fibre for horses. In fact, fibre is one of the most important components of a horse's diet, providing up to 70% of their energy needs. It is recommended that horses be fed a minimum of 1.5% of their body weight per day in fibre, with a focus on pasture and hay.
Hay is a staple forage, providing the necessary long stem fibre that takes horses longer to eat and keeps them happier. Different types of hay, such as timothy, alfalfa, and orchard grass, offer a range of nutritional profiles to suit the specific needs of your horse. Hay is also available in the form of hay cubes, which can be beneficial for respiratory health as they contain less dust than traditional hay.
Grass is another natural source of fibre for horses, especially during the grazing season. Pasture grazing promotes mental stimulation and reduces stress levels by mimicking the natural browsing behaviour of horses in the wild. Young spring grass is an excellent source of easily digestible carbohydrates for horses with higher nutritional needs.
In addition to hay and grass, pasture plants such as alfalfa can be used to create chaff, which provides additional fibre and may include added ingredients like molasses, oil, herbs, fruits, minerals, and vitamins.
By including a variety of fibre sources such as hay, grass, and pasture, horse owners can ensure their horses' fibre needs are met, supporting their overall health and well-being.
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Beet pulp and soy hulls are highly fermentable fibre sources
Beet pulp and soy hulls are excellent sources of highly fermentable fibre for horses. They are often referred to as "super fibres" because they have much higher energy levels than typical forage sources.
Beet pulp is a popular ingredient in horse feeds and can be added to a horse's diet to boost its fibre content. It is made from the fibrous portion of sugar beets after the sugar has been extracted and dehydrated, resulting in a high-fibre shred with little to no sugar. Beet pulp can be fed dry or soaked before feeding to encourage hydration. While it does not have to be soaked, soaking can help prevent the production of excessive gas as the microbial population in the horse's gut adjusts to the new feedstuff.
Soy hulls are a byproduct of soybean processing and are another rich source of highly digestible fibre. They can be beneficial for improving digestive health and providing energy for working horses. When introducing soy hulls, it is important to do so gradually to allow the horse's digestive system to adjust. Soy hulls might be more challenging to find bagged and ready for sale, but they are often used in textured and pelleted feeds, so they may be available from a nearby feed manufacturer.
Both beet pulp and soy hulls offer an energy boost compared to normal pasture grasses and hay. They are particularly useful for horses that have difficulty consuming enough fibre through hay or pasture due to dental issues or those that require an alternative source of energy to grains, such as performance horses. These highly fermentable fibre sources support intestinal health and can help prevent dehydration and electrolyte depletion during exercise by increasing water intake.
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Forage-based diets help prevent colic and behavioural issues
A forage-based diet is the best way to support a horse's gastrointestinal physiology and behavioural needs. Forage provides important nutrients while reducing the risk of digestive, metabolic, and weight issues associated with excessive grain-based feeds.
Forage-based diets are more aligned with a horse's natural biology, promoting a healthier digestive system and reducing the risk of colic and gastric ulcers. Horses have a small foregut and a large hindgut. The foregut consists of the mouth, oesophagus, stomach, and small intestine. The hindgut, which is much larger, includes the cecum, large and small colon, and rectum. Because of their relatively small foregut capacity, horses are adapted to consume small, frequent meals and engage in continuous grazing throughout the day. This constant intake ensures that the digestive system is never overwhelmed by large quantities of food, reducing the risk of digestive upset.
Feeding high-fibre forages creates an optimal environment for the hindgut microbiome to thrive and provides a continuous supply of energy for your horse. Fibre is essential for a horse's digestive health as it provides 'gut fill'. The fibre in a horse's diet provides the bulk to keep the gut full and healthy. Fibre soaks up and holds water in the gut, acting as a water reserve. Diets that don't provide enough fibre can cause colic, as the gastrointestinal tract is prone to twisting and moving in ways it can't when full of fibre. Dehydration is also a risk for horses on low-fibre diets, as they don't have this water reserve.
Forage-based diets also support a horse's behavioural needs. Extended periods of grazing on high-fibre forages mimic the natural browsing behaviour of horses in the wild, promoting mental stimulation and reducing stress levels. This behavioural enrichment is essential for overall equine welfare and can help prevent stereotypical behaviours such as cribbing or weaving.
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High-fibre feeds have a crude fibre value of 12-25%
Fibre is an essential component of a horse's diet. It provides the horse with 'gut fill' and helps to keep the digestive tract moving smoothly, preventing colic and diarrhoea. Horses require a steady supply of fermentable products, which are provided by fibrous forage.
When feeding high-fibre commercial products, it is important to ensure that the diet is properly balanced. Beet pulp, for example, has a higher digestibility than most grass hays, so the horse's diet should be adjusted accordingly. High-fibre feeds may also contain bran, such as rice bran or wheat bran, but these are less desirable due to their high phosphorus concentrations. If feeding bran, it is crucial to ensure the horse consumes enough calcium to maintain a healthy calcium-to-phosphorus ratio.
Oat hulls are another high-fibre option, but they tend to be dusty and should be blended with water before feeding. Soy hulls are a beneficial fibre source for horses, as they are rich in highly digestible fibre and can improve digestive health. When introducing soy hulls, it is important to do so gradually to allow the horse's digestive system to adjust.
In addition to commercial high-fibre feeds, there are other ways to increase fibre intake. Hay cubes, for example, are an excellent fibre source that can be easily accessed at most feed stores. They typically contain less dust than hay and result in less wasted feed. Offering hay cubes can also help to extend mealtime, mimicking the natural grazing behaviour of horses.
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Fibre is a non-digestible carbohydrate
The structural carbohydrates that make up fibre give plants their structure and form. They are found in the cell walls of plants, providing rigidity and shape to the cells. While these structural carbohydrates are indigestible to horses, they play a crucial role in the equine diet. Fibre provides bulk to the diet, helping to keep the gastrointestinal tract full and healthy. It also soaks up and retains water in the gut, acting as a water reserve and reducing the risk of dehydration.
Horses have evolved to thrive on a diet rich in fibrous plant material. Their digestive tract is specifically designed to handle fibre, making it an ideal energy source. Feeding forage, such as hay and pasture grass, is a safe way to provide horses with the fibre they need. This is because the fibre in forage is slowly digested, preventing rapid changes in blood glucose and insulin levels.
In addition to hay and pasture grass, other sources of fibre include beet pulp, soy hulls, oat hay, and hay cubes. Beet pulp, derived from sugar beet processing, is a popular fibre source due to its digestibility and palatability. Soy hulls, a byproduct of soybean processing, provide highly digestible fibre and can be beneficial for working horses in need of additional energy. Oat hay, on the other hand, is a suitable option for horses requiring weight management as it is high in fibre but low in protein. Hay cubes, which are typically accessible at feed stores, offer the same nutritional value as hay but with less dust, reducing the risk of respiratory issues.
By providing a variety of fibre sources, horse owners can ensure their horses' digestive tracts remain healthy and functioning optimally. This, in turn, helps to prevent various health issues, including colic and diarrhoea, and promotes overall equine welfare.
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Frequently asked questions
Fiber is one of the most important components of a horse's diet, providing up to 70% of their energy needs. It also helps to promote healthy digestion and a healthy gut microbiome, and can assist in preventing dehydration.
Horses can obtain fiber from forages such as hay, grass, and pasture. It can also be obtained from highly fermentable sources such as beet pulp, soy hulls, and oat hay.
A high-fiber diet can help to prevent digestive issues such as colic, maintain a healthy weight, and promote dental health. It can also reduce the risk of stereotypic behaviors such as cribbing or weaving.
In addition to hay, alternative fiber sources for horses include hay cubes, complete feeds, and forage byproducts. Beet pulp and soy hulls are also popular fiber sources due to their digestibility and palatability.
Horses that are not getting enough fiber may experience energy deficiency, vitamin deficiency, or digestive issues such as diarrhea and dehydration. It is important to monitor your horse's weight, energy levels, and digestive health to ensure they are getting the proper amount of fiber.











































