The size of a horse’s stomach is so small that roughly constitutes to only 10% of its digestive system. The capacity of its stomach is 9-15 liters. Therefore, a horse naturally eats tiny amounts of food on regular intervals. The herbivore would only require up to 15 minutes to finish a relatively large meal.

The horse’s stomach comprises three regions; the saccus caecus region, the fundus region, and pyloric regions.

The saccus caecus region connects the esophagus and the stomach. Here, the food is mixed with hydrochloric acid that aids in further breaking down the food. Subsequently, the food then enters the fundic region where pepsin and stomach acid is released. This helps digestion. Finally, the food enters the pyloric region where the stomach connects with the small intestine. The food is further digested and all fermentable lacto-bacteria is eradicated here.

So, to answer the question, how many stomachs a horse has, horses only have one stomach (unlike bulls, cows, and oxen) divided into 3 regions.

Horse Nutrition

Horses require 6 basic nutrition categories; protein, carbohydrates, fat, vitamins, minerals, and water. Many food companies that manufacture horse feed will usually have a good balance of all the above mentioned nutrients except for water. It is imperative to then ensure that your horse has access to fresh water always.

A healthy horse would generally consume around 5 – 15 gallons of water daily. However, this can vary depending on various factors such as temperature, humidity, etc. Additionally, feed your horse greens such as lettuce which also have water content.

Horses that do not receive enough water are susceptible to intestinal impactions and other forms of colic. Not to mention, they can severely get dehydrated.


  1. Can horses chew on both sides of their mouth?

Horses can chew on both sides of their mouth. However, they can only chew on one side at a time. They are incapable of simultaneously chewing from both sides. They chew with a slant in their mouth from an outside to inside motion.

  1. How much saliva does a horse produce every day?

A horse can produce up to 10 gallons of saliva daily depending on the amount of forage it consumes. As a horse chews on its food, the salivary glands, in order to moisten the food, generates saliva. This helps to smoothly enter the passage of the esophagus. The production of saliva also helps neutralize the effects of stomach acids.

  1. Does the horse’s esophagus work in both directions?

No, the horse’s esophagus works downwards only, meaning that food can travel from the mouth through the esophagus into the stomach, but cannot travel in reverse. This is also why horses cannot vomit.

  1. How much volume can a horse’s stomach hold?

A horse’s stomach can hold up to 2 gallons. This is a relatively small number in comparison with the rest of the digestive system.

  1. How long does the food remain in the horse’s stomach?

Before going into the small intestine, food remains in a horse’s stomach for roughly 15 minutes.

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