Discover 10 Insights what do horses eat for happy pets

The nutritional intake of an equine is a specialized subject centered on the dietary habits of a non-ruminant herbivore.

This classification refers to a plant-eating animal with a unique single-chambered stomach and a highly developed hindgut, where fibrous materials are broken down through fermentation.

The entire digestive system is adapted for the slow, continuous processing of high-fiber, low-starch foodstuffs.

This biological design dictates their fundamental dietary requirements and explains why their feeding patterns differ significantly from many other large animals.

Core components of this diet include high-quality forage, such as pasture grass and various types of cured hay like timothy or orchard grass.

These staples provide the essential fiber necessary for proper digestive function and gut motility. An appropriate diet built around these elements supports everything from energy levels to immune health.

The explanation for this dietary structure lies in the anatomy and physiology of the equine digestive tract. Horses evolved as grazing animals, spending many hours a day consuming small amounts of forage.

Their small stomach is designed to release food into the intestines fairly quickly, while the vast hindgut, comprising the cecum and large colon, acts as a fermentation vat.

Here, beneficial microbes break down tough plant fibers into volatile fatty acids, which the horse absorbs and uses for energy.

This system is incredibly efficient at extracting nutrients from fibrous material but is also sensitive to sudden changes or large, starchy meals, which can lead to serious health complications.

what do horses eat

The foundation of any healthy equine diet is forage, which should constitute the vast majority of their caloric intake.

Forage refers to plant-based material, primarily grasses and legumes, consumed either fresh in a pasture or preserved as hay or haylage.

This constant supply of fiber is critical not only for providing energy but also for maintaining the health of the horse’s extensive digestive system.

The act of chewing and processing fibrous material keeps the gut moving correctly, preventing issues like colic, and also satisfies a horse’s natural grazing behavior, which is important for their psychological well-being.

Hay is the most common form of preserved forage, especially for stabled horses or during seasons when pasture is unavailable. There are two main categories: grass hays and legume hays.

Grass hays, such as timothy, orchardgrass, and brome, are typically lower in protein and calories, making them a suitable base for most adult horses.

Legume hays, with alfalfa being the most prominent example, are much richer in protein, calcium, and overall energy content.

Alfalfa is often reserved for horses with higher nutritional demands, such as young, growing foals, lactating mares, or high-performance athletes.

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While forage should be the primary component, some horses require additional energy and nutrients that cannot be met by hay or pasture alone.

This is where concentrates, including grains and commercially formulated feeds, play a role.

Grains like oats, corn, and barley are traditional sources of concentrated energy, but they must be fed with caution due to their high starch content.

Modern pelleted or textured feeds are often designed to be more nutritionally balanced, providing a mix of protein, fats, fiber, vitamins, and minerals to supplement the forage-based diet of working horses or those with special needs.

Water is arguably the most critical nutrient for a horse, essential for nearly every bodily function, from digestion to thermoregulation.

A horse must have constant access to fresh, clean water, as dehydration can occur quickly and lead to severe health problems, including impaction colic.

An average-sized horse in a temperate climate will drink between 5 and 15 gallons of water per day, with this amount increasing significantly in hot weather, during strenuous exercise, or for lactating mares.

Ensuring water sources are clean and accessible at all times is a fundamental aspect of proper equine care.

In addition to forage, water, and sometimes concentrates, horses require essential salts and minerals for proper bodily function. Salt, which contains sodium and chloride, is crucial for nerve function, muscle contraction, and maintaining hydration levels.

Most horses cannot get enough salt from their regular diet, so it should be provided freely, typically in the form of a salt block or as loose salt.

A balanced mineral supplement may also be necessary to provide other key minerals like calcium, phosphorus, zinc, and copper, especially if the local forage is known to be deficient in these nutrients.

Treats can be a positive part of a horse’s life, useful for training and building a bond, but they must be given in strict moderation.

Safe and healthy options include small pieces of carrots, apples, or specially formulated horse treats.

It is vital to avoid giving large quantities of any treat, as this can upset the delicate balance of the digestive system.

Furthermore, certain human foods are inappropriate or even toxic to horses and should be avoided entirely, highlighting the importance of understanding what is safe to offer as a special reward.

It is crucial to recognize that there is no one-size-fits-all diet for every horse. Nutritional needs vary dramatically based on factors such as age, breed, workload, metabolic rate, and overall health status.

A young, growing horse has different protein and mineral requirements than a sedentary senior horse, while an elite three-day eventer requires far more calories than a recreational trail horse.

A tailored feeding plan, developed in consideration of these individual factors, is essential for long-term health and well-being.

Finally, a comprehensive understanding of what horses should not eat is as important as knowing what they should. Many common plants, such as bracken fern, ragwort, and yew, are highly toxic to equines.

Lawn clippings should never be fed, as they can ferment rapidly and cause colic or laminitis.

Additionally, foods like chocolate, avocados, onions, and cruciferous vegetables (like broccoli and cauliflower) can cause digestive distress or are poisonous.

Responsible horse ownership includes carefully managing their environment to prevent accidental ingestion of these harmful substances.

Key Principles of Equine Nutrition

1. Forage forms the foundation. The equine digestive system is specifically adapted to break down fibrous plant matter, and this forage should comprise at least 1.5-2% of a horse’s body weight daily. This high-fiber diet is essential for maintaining gut motility and provides a slow, steady release of energy. Depriving a horse of adequate forage can lead to severe health issues, including gastric ulcers, colic, and behavioral problems like stall weaving or wood chewing. Therefore, any feeding plan must prioritize access to quality hay or pasture above all other feedstuffs.
2. Mimic natural grazing patterns. In the wild, horses graze for 16-18 hours a day, consuming small amounts of food continuously. This “trickle feeding” approach is ideal for their small stomachs and keeps the digestive tract functioning optimally. Providing large, infrequent meals can overwhelm the stomach and lead to undigested starch reaching the hindgut, which can disrupt the microbial balance and cause colic or laminitis. Using slow feeders or providing multiple small hay feedings throughout the day helps replicate a more natural and healthier eating pattern.
3. Ensure constant access to fresh water. Water is indispensable for all physiological processes, including digestion, nutrient absorption, and temperature regulation. Dehydration is a serious risk that can quickly lead to life-threatening conditions like impaction colic, as the intestinal contents become too dry to pass through the digestive tract. A horse should always have access to a clean, fresh, and unfrozen water source, and intake should be monitored, especially during travel or extreme weather conditions.
4. Implement all dietary changes slowly. The delicate population of microbes in a horse’s hindgut is specialized to digest its current diet. Any abrupt change in feed, whether switching hay types or introducing a new concentrate, can disrupt this microbial balance, leading to digestive upset. To prevent this, all new feeds should be introduced gradually over a period of 7 to 14 days. This allows the microbial populations to adapt, minimizing the risk of colic or other digestive disturbances.
5. Use concentrates with caution. Concentrated feeds, such as grains and commercial mixes, are designed to provide a dense source of energy and are not necessary for all horses. They should only be used to supplement a forage-based diet when a horse’s energy needs cannot be met by forage alone, such as for performance athletes, hard keepers, or lactating mares. Overfeeding concentrates, particularly those high in starch, is a common cause of health problems like obesity, laminitis, and metabolic syndrome.
6. Provide free-choice salt and balanced minerals. Salt is a critical electrolyte that horses often do not get in sufficient quantities from their forage. Providing a plain salt block or loose salt allows them to regulate their own intake according to their needs. Additionally, forage may be deficient in other essential minerals like selenium, zinc, and copper, depending on the soil where it was grown. A balanced vitamin and mineral supplement can fill these nutritional gaps and support overall health, hoof quality, and immune function.
7. Recognize the impact of dental health. A horse’s ability to properly eat and digest its food begins in the mouth. Proper mastication, or chewing, is the first step of digestion, breaking down long fibers and mixing food with saliva. Dental problems such as sharp points, hooks, or loose teeth can cause pain and prevent a horse from chewing effectively. This can lead to weight loss, choke, or colic, making regular dental examinations by a qualified professional an essential component of any feeding program.
8. Monitor body condition regularly. Visual assessment and hands-on evaluation of a horse’s fat cover are crucial for determining if their diet is appropriate. Using a standardized system like the Henneke Body Condition Score (BCS) on a scale of 1 to 9 provides an objective way to track a horse’s weight. This allows for timely dietary adjustments to be made, preventing the horse from becoming either underweight or overweight, both of which carry significant health risks.
9. Understand the nutritional value of hay. Not all hay is created equal; its nutritional content can vary significantly based on the type of plant, its maturity at harvest, and storage conditions. A leafy, green alfalfa hay will be much higher in protein and calories than a mature, stemmy timothy hay. For horses with specific dietary needs, such as metabolic issues or allergies, having the hay professionally analyzed can provide precise nutritional data. This information allows for the creation of a truly balanced and appropriate diet.
10. Be vigilant about toxic plants and substances. Horses generally avoid toxic plants, but they may consume them out of boredom, hunger, or if the toxins are mixed in with their hay. It is imperative for horse owners to be able to identify and remove poisonous plants from pastures and turnout areas. Common culprits include red maple leaves, black walnut, yew, and oleander. Awareness and proactive management of the horse’s environment are key to preventing accidental poisoning.

Practical Feeding Tips and Details

• Feed by Weight, Not by Volume.

  One of the most common feeding mistakes is measuring feed using scoops or containers without knowing the actual weight.

  The density of different feeds can vary dramatically; a scoop of oats weighs significantly less than the same scoop filled with a dense, pelleted feed.

  To ensure accuracy and consistency, all feed, including hay and concentrates, should be weighed using a scale.

  This practice is critical for managing a horse’s caloric intake precisely, preventing both underfeeding and overfeeding, and is especially important when managing the diet of a horse with metabolic conditions.

• Utilize Slow-Feeding Systems.

  Slow feeders, such as hay nets with small openings or specialized tubs and boxes, are excellent tools for extending the time a horse spends eating.

  This method more closely mimics natural grazing behavior, which benefits the horse both physically and mentally.

  By slowing down consumption, these systems promote better digestion, reduce the risk of gastric ulcers, and alleviate boredom and associated stall vices.

  They are particularly beneficial for horses that are on a restricted diet for weight management, as it allows them to have forage available for longer periods without overconsuming calories.

• Manage Pasture Access Carefully.

  While pasture is an excellent source of nutrition, it also poses risks, particularly in the spring and fall when grasses can be very high in sugar.

  High-sugar grass can trigger laminitis, a painful and debilitating hoof condition, especially in horses prone to metabolic issues.

  Using a grazing muzzle can limit intake while still allowing the horse to enjoy turnout and social interaction.

  Additionally, managing pastures through rotational grazing helps prevent overgrazing, which depletes the grass and can lead to an increase in undesirable weeds, some of which may be toxic.

• Consult with Equine Professionals.

  Creating the optimal diet for a horse can be complex, and it is wise to seek professional guidance.

  An equine veterinarian can assess the horse’s overall health and identify any medical conditions that may impact its dietary needs. For more detailed nutritional planning, consulting with an equine nutritionist can be invaluable.

  These experts can help formulate a balanced diet based on forage analysis, the horse’s workload, and individual health requirements, ensuring all nutritional needs are met without unnecessary or potentially harmful supplementation.

The intricate design of the equine digestive system dictates its specific dietary needs.

Unlike ruminants, horses have a relatively small stomach that processes food quickly, moving it into the small intestine where proteins, fats, and simple carbohydrates are absorbed.

The majority of digestion, however, occurs in the hindgut, a large fermentation chamber where microbes break down complex carbohydrates from forage.

This continuous, fiber-based fermentation process is the horse’s primary energy source and is essential for maintaining a stable and healthy internal environment.

Disrupting this system with large, starchy meals can lead to a cascade of metabolic problems.

A direct link exists between a horse’s diet and its susceptibility to common and often severe health issues.

Colic, a general term for abdominal pain, is frequently tied to dietary mismanagement, such as sudden feed changes or poor-quality forage.

Similarly, laminitis is a metabolic disease often triggered by an overload of sugars and starches, commonly from lush pasture or excessive grain intake.

By adhering to a forage-first, low-starch feeding philosophy, horse owners can significantly mitigate the risk of these and other diet-related ailments, promoting long-term soundness and health.

The nutritional requirements of senior horses demand special consideration. As horses age, their digestive efficiency may decrease, and they can face dental issues that make chewing long-stem hay difficult.

Diets for geriatric horses often need to be higher in easily digestible protein to prevent muscle loss and may require fat supplementation for extra calories.

Soaked hay cubes, beet pulp, or complete senior feeds provide a softer, more palatable food source that is easier to chew and swallow, ensuring these older companions continue to receive the nutrition they need to thrive in their golden years.

Feeding a performance horse is a science of balancing energy supply with the demands of intense physical activity. These equine athletes require more calories, protein, and electrolytes than their sedentary counterparts.

While high-quality forage remains the foundation, their diet is often supplemented with concentrates rich in digestible fibers and fats, which provide a cooler, more sustainable energy source than high-starch grains.

Proper nutrition not only fuels performance but also supports muscle development, aids in post-exercise recovery, and helps maintain a strong immune system under the stress of training and competition.

Managing the diet of an overweight horse or one diagnosed with a metabolic condition like Equine Metabolic Syndrome (EMS) or Cushing’s Disease (PPID) requires strict control of non-structural carbohydrates (NSC).

For these horses, the focus shifts to low-sugar, low-starch forages, which may need to be soaked to leach out excess sugars.

Concentrates are typically eliminated or replaced with a ration balancer, which provides essential vitamins and minerals without adding significant calories or starch.

A carefully managed diet, combined with appropriate exercise, is the cornerstone of controlling these conditions and preventing laminitis.

Fiber’s role in the equine diet extends far beyond simply providing calories.

The physical act of chewing and consuming fibrous material produces saliva, which acts as a natural buffer against stomach acid, helping to prevent gastric ulcers.

Furthermore, a gut full of fiber holds water, creating a reserve that can help maintain hydration.

Psychologically, the continuous process of foraging satisfies a deep-seated behavioral need, reducing stress and preventing the development of abnormal behaviors, or stereotypies, such as cribbing or weaving in stabled horses.

Dietary needs can also fluctuate significantly with the seasons. In the summer, fresh pasture may provide a rich source of calories and nutrients, sometimes necessitating restricted grazing to prevent weight gain.

Conversely, in the winter, horses rely entirely on hay and may require more calories to maintain body temperature in cold weather.

Water intake can also decrease in the winter if the only source is icy cold, so providing heated or at least lukewarm water can encourage adequate hydration during the colder months.

While a balanced, forage-based diet meets the needs of most horses, targeted supplementation can be beneficial in certain circumstances.

Supplements should never be used to fix a poor-quality diet but rather to address a specific, identified need.

For example, a horse with stiff joints may benefit from a joint supplement containing glucosamine, while one with poor hoof quality might need added biotin.

It is always best to consult with a veterinarian or nutritionist before adding any supplements to ensure they are necessary, effective, and fed in the correct dosage.

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