Horse losing weight but eating? Causes and Solutions

Weight loss in horses, even when they are eating, can be a concerning issue for horse owners. Understanding the underlying causes of weight loss is crucial for ensuring the health and well-being of the horse. By identifying and addressing the reasons for weight loss, owners can take appropriate actions to help their horses regain and maintain a healthy weight.

Why is Horse losing weight but eating?

There are several factors that can contribute to weight loss in horses despite eating well. These factors can include health issues, such as liver or kidney problems, poor digestion, parasites, and stress, among others.

It is important for horse owners to be aware of these factors and monitor their horses for any signs of weight loss or other health concerns. In the following sections, we will explore these factors in more detail and discuss potential solutions to help horses maintain a healthy weight.

Common Causes of Weight Loss in Horses

Horse losing weight but eating

Low albumin levels and related health issues

Low albumin levels in horses can be a sign of underlying health issues that contribute to weight loss despite eating well. Albumin is an essential protein produced by the liver, which helps maintain fluid balance, transports various substances in the bloodstream, and supports overall health.

The following health issues can lead to low albumin levels in horses:

Liver disease:

Liver disease can lead to a decrease in albumin levels in horses. Albumin is a protein produced by the liver, which plays a crucial role in maintaining fluid balance and transporting various substances in the bloodstream.

When a horse suffers from liver disease, its ability to produce albumin can be impaired, leading to weight loss despite adequate food intake.

Kidney problems: Kidney issues can also contribute to low albumin levels and subsequent weight loss in horses. The kidneys help filter waste and maintain electrolyte balance in the body.

When they are not functioning properly, they can leak albumin into the urine, resulting in a depletion of this essential protein and a decline in the horse’s overall health and weight.

Bowel malfunction:

A malfunctioning bowel can interfere with the absorption of nutrients, including albumin, leading to weight loss in horses. Bowel issues can be caused by various factors, such as inflammation, infections, or obstructions.

These issues can negatively impact the horse’s ability to digest and absorb nutrients, resulting in weight loss despite adequate food consumption.

Abnormal digestion, absorption, or metabolism of nutrients

Abnormal digestion, absorption, or metabolism of nutrients can be a significant factor contributing to weight loss in horses, even when they are eating enough. Various issues can lead to these abnormalities, affecting the horse’s ability to maintain a healthy weight:

Gastrointestinal disorders:

Conditions such as gastric ulcers, colitis, or enteritis can impair the normal functioning of the horse’s digestive system, resulting in poor digestion and absorption of nutrients. These disorders can cause inflammation, pain, and damage to the lining of the digestive tract, impacting the horse’s ability to process and utilize the nutrients from their diet.

Dental problems:

Dental issues, such as sharp tooth edges, abscesses, or misaligned teeth, can hinder the horse’s ability to chew food properly. Inadequate chewing can result in poor digestion and absorption of nutrients, leading to weight loss despite sufficient food intake.

Metabolic disorders:

Metabolic disorders, such as insulin resistance, Cushing’s disease, or hypothyroidism, can affect a horse’s ability to metabolize and utilize nutrients effectively. These conditions can lead to imbalances in the horse’s energy expenditure and storage, resulting in weight loss even when the horse is eating well.

Malabsorption syndromes:

Some horses may suffer from malabsorption syndromes, where their digestive system is unable to absorb specific nutrients effectively. These conditions can lead to nutritional deficiencies and weight loss, despite the horse consuming an adequate diet.

Primary muscle wasting disorders

Primary muscle wasting disorders, also known as myopathies, are conditions that cause the breakdown of muscle tissue, leading to weight loss in horses. These disorders can be inherited or acquired and may result from metabolic imbalances, nutritional deficiencies, or inflammatory processes.

They can affect the horse’s ability to maintain muscle mass and overall body condition, leading to weight loss despite adequate food intake.


Parasites are a common cause of weight loss in horses. Internal parasites, such as worms, compete with the horse for nutrients, reducing the amount of protein available for the horse’s body. They can also cause irritation and damage to the digestive tract tissue, making it difficult for the horse to absorb and utilize nutrients properly.

Younger and older horses are more susceptible to parasitic infections, which can lead to weight loss.

Poor quality or limited feed supply

A poor quality or limited feed supply can result in weight loss for horses, even if they are eating. The low-quality feed may not provide adequate nutrients, leading to deficiencies affecting the horse’s overall health and body condition.

Additionally, limited access to feed can result in insufficient calorie intake, which can cause weight loss despite the horse’s willingness to eat.

Health and disease problems

These problems may include infections, inflammation, or organ dysfunction, which can affect the horse’s ability to utilize nutrients properly. Identifying and treating these underlying health issues is crucial for helping the horse regain and maintain a healthy weight.

Social interaction and competition between horses

Horses in a group setting may compete for access to food, with dominant horses preventing others from eating enough. Additionally, stress from social interactions can affect a horse’s appetite and digestion, leading to weight loss even when food is available.

Monitoring and managing herd dynamics can help ensure that all horses have equal access to feed and a stress-free environment, reducing the risk of weight loss due to social factors.

Stress-related weight loss in horses

Effects of Stress on Appetite and Digestion

Stress can have a significant impact on a horse’s appetite and digestion, leading to weight loss. Horses, like humans, can be negatively affected by stress from various sources, such as a new environment, changes in herd dynamics, sudden health issues, or new training regimens.

Stress can cause physiological changes in the horse’s body, such as increased cortisol levels, which can negatively affect appetite, leading to reduced food intake. Additionally, stress can interfere with the normal function of the digestive system, impairing nutrient absorption and utilization.

Gastric ulcers as a result of stress

Gastric ulcers are a common issue in horses, and stress can contribute to their development. Stress can increase the production of stomach acid and decrease the protective mucus lining of the stomach, making the horse more susceptible to ulcer formation.

Gastric ulcers can cause pain and discomfort, which can further reduce the horse’s appetite and ability to maintain a healthy weight. Moreover, ulcers can also impair the absorption of nutrients from the diet, exacerbating weight loss in stressed horses.

Dietary Solutions for weight loss in Horses

Ensuring a balanced diet with enough fiber, vitamins, and minerals

Providing a balanced diet is essential for maintaining a healthy weight in horses. A well-balanced diet should include enough fiber, vitamins, and minerals to support the horse’s overall health and well-being. High-quality hay or pasture should be the primary source of fiber, along with other forages such as alfalfa or beet pulp.

Providing appropriate vitamin and mineral supplements, as needed, can help ensure the horse’s nutritional needs are met and support healthy weight maintenance.

Incorporating a low-carbohydrate, high-fat diet

For some horses, incorporating a low-carbohydrate, high-fat diet may help with weight maintenance. This type of diet can provide more concentrated energy sources for the horse, allowing them to maintain or gain weight while consuming less volume.

Feeding sources of fat, such as vegetable oils, rice bran, or flaxseed, can provide additional calories without overloading the horse with carbohydrates.

It’s essential to consult with a veterinarian or equine nutritionist when designing a low-carbohydrate, high-fat diet to ensure the horse’s specific needs are met, and to monitor their response to the dietary changes.

Caring for older horses experiencing weight loss

Adding water to feed for easier digestion

Older horses may have more difficulty chewing and digesting their food, which can contribute to weight loss. One way to address this issue is by adding water to the feed, making it softer and easier to chew and digest.

Soaking hay or hay cubes, as well as moistening pelleted or textured feeds, can help improve the palatability and digestibility of the diet for older horses, supporting better nutrient absorption and weight maintenance.

Utilizing supplements to improve gastro efficiency

Supplementing the diet of older horses with products designed to improve gastrointestinal efficiency can also help prevent weight loss. These supplements may include digestive enzymes, probiotics, or prebiotics, which can aid in the breakdown and absorption of nutrients from the horse’s diet.

Using supplements can help optimize the horse’s digestive function and support healthy weight maintenance.

Recognizing the signs of malnutrition in underweight horses

It’s crucial to recognize the signs of malnutrition in underweight horses, especially for older individuals who may be more susceptible to weight loss. Symptoms of malnutrition can include accentuated shoulders and withers, cracked or crumbling hooves, depression, discolored or brittle mane and tail, dull coat, exercise intolerance, lameness, and lethargy.

Monitoring the horse’s body condition and being proactive in addressing any issues is essential for maintaining their overall health and well-being. Regular veterinary check-ups and proper management can help identify and treat underlying causes of weight loss, ensuring older horses can maintain a healthy weight.


In conclusion, weight loss in horses despite eating can result from various factors such as health issues, parasites, poor nutrition, and stress. Addressing these factors through proper management, nutrition, and veterinary care is essential for maintaining a horse’s overall well-being.

For older horses, providing appropriate dietary adjustments and monitoring their condition can help prevent malnutrition and support a healthy weight.

Leave a Comment

Your email address will not be published. Required fields are marked *