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A foal not nursing is a serious concern for any owner or caretaker involved in horse breeding. Newborn foals rely on frequent milk intake for hydration, energy, immune support, and early growth. During the first weeks of life, healthy foals nurse many times each hour, so a foal that fails to latch, stops nursing, or nurses poorly requires close attention.
Nursing problems can originate with the foal, the mare, or both. Because newborn foals can decline quickly, changes in nursing behavior warrant prompt veterinary attention. Early evaluation helps identify the cause, protect the foal from dehydration or failure of passive transfer, and guide safe feeding support when needed.
Keep reading to learn why a foal may stop nursing, how to recognize an emergency, what to do while waiting for veterinary care, and how veterinarians diagnose and treat nursing problems in foals.
Foal Not Nursing
Nursing is one of the most important needs a newborn foal has after delivery. Mare’s milk provides vital nutrients and fluids, while colostrum, the mare’s first milk, contains antibodies that are crucial for developing the foal’s immune protection. [1]
Newborn foals should stand and suckle within the first 2 – 3 hours after birth. During the first week of life, foals nurse 5 – 7 times per hour, consuming around 23% of their body weight in milk per day. Each nursing session should last roughly 2 minutes. [1]
Foals who do not nurse within the first 24 hours after birth are at risk of failure of passive transfer. [1]
This serious, often life-threatening condition occurs when the foal does not receive enough antibodies to mount an effective immune response. Foals are born without meaningful circulating antibodies, so receiving adequate colostrum is critical for survival.
Beyond the first day of life, foals who do not nurse or nurse poorly are at risk of malnutrition and dehydration. Newborn foals with malnutrition have a high risk of multiple organ system failure because their tissues do not receive enough energy to function. [1]
Over time, malnourished foals have a higher risk of: [1]
- Infections
- Gastrointestinal problems, such as ileus (inadequate movement of the intestines)
- Liver failure
- Impaired wound healing
- Impaired respiratory function due to muscle atrophy
- Severe dehydration
For these reasons, ensuring foals nurse frequently and for an adequate length of time is key for foal health.
Normal vs. Abnormal Nursing Behavior
Healthy foals display suckling behaviors within a few minutes after birth, visible as sucking movements with the mouth and tongue. [1] The foal should be able to sit sternally (lying with the body upright and legs underneath) within 5 – 30 minutes after birth. [2]
Foals usually attempt to stand within 30 minutes after delivery. [2] Once the foal stands successfully, they should begin seeking the mare’s udder by moving along the mare’s belly. Many mares gently push their foals toward the udder during this phase. [1]
The first successful nursing bout typically occurs between 1 – 3 hours after birth. [2] Once the foal has nursed for the first time, they typically nurse between 5 – 7 times per hour. [1] The rate of nursing decreases to around twice an hour by 2 – 3 months of age. [3] Foals typically rest or play between nursing episodes.
During a nursing session, foals should latch onto the udder successfully and nurse for 1 – 2 minutes. [3] Foals who have not latched or are receiving inadequate milk may attempt to nurse continuously without taking a rest period between attempts. The mare may also stream or drip milk between nursing attempts, indicating the foal is not successfully latching and drinking milk. [3]
Any foal who does not nurse successfully by 3 hours after birth should be seen by a veterinarian immediately. These foals have a very high risk of failure of passive transfer.
Paying attention to the timing and general suckling behavior of the foal is critical. Early identification of nursing problems can help prevent malnutrition and failure of passive transfer by allowing for prompt veterinary treatment. When in doubt, having a veterinarian evaluate your foal’s nursing behavior is better than taking a wait-and-see approach.
Table 1. Expected timing of foal nursing milestones
| Time after birth | Normal benchmark | When to call the veterinarian |
|---|---|---|
| Within a few minutes |
|
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| 5 – 30 minutes |
|
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| Within 1 hour |
|
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| Within 2 hours |
|
|
| Within 3 hours |
|
|
| Within 4 hours |
|
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| After first nursing |
|
|
When to Call the Veterinarian
A foal that is not nursing normally requires prompt veterinary evaluation because newborn foals can decline quickly.
Call your veterinarian immediately if a foal:
- Does not stand and nurse successfully within 3 hours after birth
- Suddenly stops nursing or repeatedly fails to latch
- Appears weak, lethargic, painful, bloated, or reluctant to stand
- Shows poor or absent suckle reflex, difficulty swallowing, or milk from the nose
- Goes more than 1 – 2 hours without successfully drinking milk
- Has a mare with a hot, swollen, painful, firm, or dripping udder
A veterinarian may assess the foal’s hydration, blood glucose, infection risk, suckle reflex, antibody status, and ability to stand and swallow safely. They may also examine the mare’s udder, milk production, maternal behavior, and postpartum health.
Do not force-feed large amounts of milk without veterinary direction. Weak foals or foals with a poor suckle reflex are at risk of aspiration pneumonia if milk enters the airway.
What's your top priority with your horse's health?
What's your top priority with your horse's health?
Causes
There are several reasons a foal may not nurse appropriately, including conditions affecting the mare. Careful observation and veterinary oversight are necessary to determine the underlying cause of poor nursing and treat the mare-foal pair appropriately.
Maternal Causes
For the foal to nurse successfully, the mare must allow nursing and provide adequate milk. Some mares outright reject their foals, while others may have conditions preventing milk production or effective nursing.
Foal Rejection
Foal rejection refers to mares who do not tolerate their foal’s presence. These mares may avoid their foal, refuse to let the foal nurse, or display aggressive behaviors toward their foal. [1] Typically, overt foal rejection is obvious and is not perceived only as the foal not nursing.
However, some mares may accept their foals but prevent nursing. This may occur due to: [1]
- Discomfort from a full and tender udder
- Strong uterine contractions after delivery
- Anxiety or fear of the foal during nursing attempts
- Excessive human intervention disrupting the mare
- Inexperience in maiden mares raising foals for the first time
Maternal behavior can change quickly after foaling, so nursing attempts should be observed closely until the foal is nursing consistently.
Mastitis
Mastitis refers to inflammation of the mammary gland, usually associated with a bacterial infection. [1] Most cases in horses develop 4 – 8 weeks after weaning the foal, but mastitis can occur during nursing if the foal is not nursing frequently. [1]
Mares with mastitis often do not allow nursing because their udder is hot, swollen, and painful. A painful udder may also make the mare kick, shift away from the foal, or resist standing still during nursing attempts.
Agalactia
Agalactia is the failure of the mammary gland to produce milk after delivery. [1] Without milk available, the foal’s nursing behavior often stops because nursing attempts are unrewarding.
The most common cause of agalactia in mares is ingestion of fescue containing ergot alkaloids produced by an endophyte fungus, which is associated with fescue toxicosis., which is associated with fescue toxicosis. [1] Low or absent milk production requires prompt veterinary management to protect the foal and support the mare.
Foal Causes
Nursing requires the foal to stand, find the udder, latch, and suckle. Failure of any of these steps can prevent a foal from nursing appropriately.
Below are some of the most common causes of poor nursing in foals. This list is not exhaustive, as any condition affecting the health of the foal can reduce their appetite and willingness to nurse.
Dummy Foal Syndrome
Dummy foal syndrome refers to foals who do not meet the typical benchmarks of sitting, standing, and nursing. Current research suggests these foals may have neonatal encephalopathy, a condition that may involve inadequate oxygen delivery to the brain around the time of delivery. [1]
Affected foals typically appear healthy at birth. Within several hours to days, they may show signs such as: [1]
- Inability to find the udder
- Poor or no suckle reflex
- Little to no attachment to their dam
- Weak tongue tone
- Difficulty swallowing
Affected foals are often described as “not nursing” because they seem disinterested in their mother or are unable to find her udder for feeding.
Sepsis or Other Infections
Foals are extremely susceptible to infections in the early neonatal period. This is particularly true if there is failure of passive transfer and they do not receive antibodies from their dam’s colostrum.
Foals with sepsis or other infections can show signs such as lethargy, unwillingness to stand, and decreased suckling from the mare. [1]
Because early signs can be vague, reduced nursing may be one of the first warning signs that a newborn foal is becoming ill.
Meconium Impaction
Meconium is the first fecal material the foal passes after birth, usually within the first few hours after delivery. This sticky, pasty material can become stuck in the gastrointestinal tract, preventing the foal from passing manure.
Foals with meconium impaction develop abdominal discomfort, often resulting in decreased nursing and prolonged periods lying down. [1] Nursing changes may occur alongside straining, restlessness, or signs consistent with colic in foals.
Musculoskeletal Conditions
Foals can be born with a variety of musculoskeletal conditions that make standing and nursing difficult. The most common abnormalities include: [1]
- Flexural deformities
- Prematurity or dysmaturity leading to inadequate bone mineralization
- Tendon laxity
- Fractures associated with difficult delivery or being stepped on by the mare
- Bacterial infections leading to arthritis or bone infection
Any condition that makes standing painful or mechanically difficult can interfere with nursing. In these cases, supporting the foal’s ability to stand safely is often part of the veterinary treatment plan.
Gastric Ulcers
Like older horses, foals can also develop gastric (stomach) ulcers. Typically, ulcers develop in foals who were already sick from another condition and were nursing poorly. [1]
Drinking milk rapidly increases stomach pH, which helps protect the stomach from ulcer development. However, foals with gastric ulcers may continue to show poor appetite and nursing reluctance, even if their underlying condition is treated. [1]
Oral Deformities
To nurse, the foal must be able to make a tight seal around the teat. Foals may be born with malformations affecting the oral cavity that make suckling and nursing difficult.
Common oral malformations in horses include: [1]
- Cleft palate: an opening in the roof of the mouth that allows milk to enter the nasal sinuses
- Mandibular brachygnathia: an excessively short lower jaw with a protruding upper jaw
- Mandibular prognathia: an excessively short upper jaw with a protruding lower jaw
Foals with oral malformations may show repeated unsuccessful nursing attempts, milk leakage, or difficulty maintaining a latch.
Table 2. Possible causes of a foal not nursing
| Cause | Mare or foal | Key signs | Why nursing is affected |
|---|---|---|---|
| Foal rejection |
|
|
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| Mastitis |
|
|
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| Agalactia |
|
|
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| Dummy foal syndrome |
|
|
|
| Sepsis or other infections |
|
|
|
| Meconium impaction |
|
|
|
| Musculoskeletal conditions |
|
|
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| Gastric ulcers |
|
|
|
| Oral malformations |
|
|
|
Diagnosis & Treatment
To diagnose a poorly nursing foal, the veterinarian must first determine whether the problem lies with the foal, the mare, or both. This involves a thorough physical examination of the mare and foal.
Depending on their findings, they may pursue additional diagnostic testing such as: [1]
- Bloodwork
- Blood culture
- Antibody level testing
- Ultrasound
- Endoscopy using a camera to assess internal structures
- X-rays
These diagnostic tests help guide the treatment plan. In many cases, veterinarians administer supportive care while waiting for test results. This typically involves nasogastric intubation of the foal.
In this procedure, a tube is passed through the foal’s nose into the stomach, allowing the veterinarian to deliver milk products directly. Nasogastric tubes may be left in place for several days for ongoing feeding. In severe cases, the foal may require intravenous (into a blood vessel) fluids to help maintain hydration. [1]
Treatment
The treatment plan for a foal who isn’t nursing depends on physical examination results and diagnostic testing.
Treatments may involve: [1]
- Antibiotics
- An enema to relieve meconium impaction
- Surgical procedures to correct malformations or help the foal stand
- The “Madigan squeeze” procedure to help resolve dummy foal syndrome
- Hormone-stimulating medications for the mare to promote milk production or counteract foal rejection
Because nursing failure can have multiple causes, treatment is tailored to the mare-foal pair rather than the nursing behavior alone.
Prevention
Many of the conditions leading to a poorly nursing foal are not preventable. However, owners can avoid serious consequences by promptly identifying foals who are not nursing correctly.
Careful monitoring of newborn foals is key, including timing how long it takes for them to reach certain benchmarks. Veterinarians often use the 1-2-3-4 rule to help owners remember the timing:
- Foals should stand within 1 hour after birth
- Foals should suckle within 2 hours after birth
- Mares should pass their placenta by 3 hours after birth
- Foals should pass meconium by 4 hours after birth
Failure of the mare or foal to meet these guidelines is a medical emergency. Prompt recognition and veterinary treatment are crucial for the health of the mare and foal.
After the first day of life, continue carefully monitoring the foal’s milk intake. The foal should nurse frequently, and each nursing effort should last around 1 – 2 minutes. [1] If the foal seems disinterested in nursing, contact your veterinarian immediately for evaluation.
If the mare cannot provide adequate milk or safely allow nursing, your veterinarian may discuss temporary feeding options, donor colostrum, or management strategies used for orphan foals. These approaches are guided by the foal’s age, suckle reflex, health status, and risk of aspiration.
Feeding Lactating Mares
A foal that is not nursing requires veterinary attention, and it’s important to understand that nutrition cannot replace emergency care for a weak or poorly nursing foal. With that being said, the mare’s diet can play an important role in supporting milk production and maintaining her body condition during lactation.
Lactating mares have higher requirements for water, calories, protein, amino acids, vitamins, and minerals than mares at maintenance. [4] They should have constant access to clean, fresh water and free-choice loose salt, along with high-quality forage to support increased feed intake.
A balanced diet for the mare helps support consistent milk production while reducing the risk of excessive body condition loss. Owners should monitor the mare’s weight, body condition score, appetite, and udder fill throughout early lactation.
If your broodmare is losing condition, producing limited milk, or eating poorly, consult your veterinarian and consider working with a qualified equine nutritionist to help make a tailored diet plan.
Frequently Asked Questions
Here are some frequently asked questions about foals not nursing:
A foal may suddenly stop nursing because of illness, weakness, pain, congenital abnormalities, injury, or a problem with the mare. Common causes include neonatal sepsis, dummy foal syndrome, meconium impaction, gastric ulcers, oral malformations, musculoskeletal problems, mastitis, agalactia, or foal rejection. Because newborn foals rely on frequent milk intake for hydration, energy, and immune support, any sudden change in nursing behavior should be treated as urgent.
It is not normal for a newborn foal to repeatedly miss feedings or go long periods without successfully nursing. Healthy foals usually nurse 5 to 7 times per hour during the first week of life, with each nursing bout lasting about 1 to 2 minutes. A single missed attempt may not always mean a crisis, but repeated unsuccessful nursing attempts or more than 1 to 2 hours without drinking milk warrants immediate veterinary attention.
There is no reliably safe amount of time for a newborn foal to go without nursing. Foals have limited energy reserves and can quickly become weak, dehydrated, hypoglycemic, or unable to stand. A foal that has not nursed successfully by 3 hours after birth needs emergency veterinary care because of the high risk of failure of passive transfer.
If your foal will not nurse, keep the mare and foal together in a safe, quiet area and contact your veterinarian immediately. Watch whether the foal can stand, find the udder, latch, and suckle, and note how long it has been since the last successful nursing bout. Do not force-feed large amounts of milk without veterinary guidance, because weak foals or foals with poor suckle reflexes can inhale milk into the lungs.
You should call the veterinarian immediately if a foal has not nursed by 3 hours after birth, stops nursing, nurses poorly, cannot stand, seems weak, or repeatedly searches for the udder without latching. Veterinary care is also urgent if the mare will not allow nursing, has a painful or swollen udder, or does not appear to be producing milk. Nursing problems can progress quickly, so a wait-and-see approach is risky in newborn foals.
A foal that is getting enough milk should nurse frequently, latch effectively, and appear settled between nursing episodes. The mare's udder should soften after the foal nurses, and the foal should not spend long periods making repeated unsuccessful attempts to feed. A persistently full udder, milk dripping from the mare, lethargy, prolonged lying down, or poor growth can indicate the foal is not removing or receiving enough milk.
A mare can cause a foal to stop nursing if she rejects the foal, prevents nursing, has udder pain, or does not produce enough milk. Foal rejection may involve avoidance, aggression, anxiety during nursing attempts, or refusal to stand still for the foal. Mastitis, agalactia, a tender full udder, strong uterine contractions, or inexperience in maiden mares can also interfere with normal nursing.
Failure of passive transfer occurs when a foal does not receive enough antibodies from the mare's colostrum. Foals are born without adequate immune protection, so they depend on colostrum during the first hours of life to support immune function. A foal that does not nurse within the first 24 hours is at high risk, and foals that have not nursed by 3 hours after birth should be evaluated urgently.
Dummy foal syndrome can make a foal stop nursing or fail to nurse normally because affected foals may not find the udder, latch, or show normal attachment to the mare. These foals may appear normal at birth and then develop poor suckle reflex, weak tongue tone, difficulty swallowing, or disinterest in the dam within hours to days. Veterinary treatment may include supportive care and procedures such as the Madigan squeeze, depending on the foal's condition.
Meconium impaction can affect nursing because abdominal discomfort may make a foal lie down for long periods and nurse less often. Meconium is the foal's first fecal material and should usually pass within the first few hours after birth. Failure to pass meconium by 4 hours after birth is part of the 1-2-3-4 emergency guideline and should prompt veterinary care.
Pain or lameness can prevent a foal from nursing because the foal must stand, balance, find the udder, and remain in position long enough to suckle. Flexural deformities, tendon laxity, fractures, prematurity, dysmaturity, arthritis, or bone infections can all make standing and nursing difficult. Any foal that cannot stand and nurse normally needs prompt veterinary evaluation.
Bottle-feeding a foal that will not nurse should only be done under veterinary direction. A weak foal, a foal with poor suckle reflex, or a foal with difficulty swallowing can aspirate milk into the lungs, leading to aspiration pneumonia. Veterinarians may use nasogastric intubation to deliver milk directly into the stomach when a foal cannot nurse safely.
Veterinarians diagnose why a foal is not nursing by examining both the foal and the mare. The foal may need bloodwork, blood culture, antibody level testing, ultrasound, endoscopy, or X-rays, depending on the suspected cause. The mare's udder, milk production, comfort, and behavior are also important because maternal problems can be the primary reason nursing fails.
Treatment for a foal that is not nursing depends on the underlying cause and the foal's condition. Supportive care may include nasogastric feeding, intravenous fluids, antibiotics, enemas for meconium impaction, surgery for certain malformations or orthopedic problems, or procedures to support foals with dummy foal syndrome. Mares may also require treatment for milk production problems, udder pain, or behaviors that interfere with nursing.
A foal may nurse poorly during periods of stress, but stress should not be assumed to be the only cause. Environmental disruption, excessive handling, severe weather, transportation, or separation from the mare may reduce nursing behavior, but illness, pain, and maternal problems must be ruled out first. Any foal that is not nursing normally should be assessed as a potential medical emergency.
Nursing problems in foals cannot always be prevented, but serious consequences can often be reduced with close monitoring and early veterinary care. Owners should watch newborn foals against the 1-2-3-4 rule: stand within 1 hour, suckle within 2 hours, placenta passed by 3 hours, and meconium passed by 4 hours. After the first day, continue monitoring nursing frequency, latch quality, udder changes, and the foal's energy level so problems are recognized quickly.
Summary
A foal that stops nursing should always be treated as a veterinary emergency until the cause is identified. Because newborn foals rely on frequent milk intake for hydration, energy, and immunity, prompt recognition and treatment of nursing problems are critical for a successful outcome.
- Healthy foals typically nurse 5 – 7 times an hour, so prolonged interruptions are abnormal
- Nursing failure may result from illness, injury, congenital defects, or maternal problems, such as mastitis or low milk production
- Signs of inadequate milk intake include lethargy, repeated unsuccessful nursing attempts, weight loss, and milk dripping from the mare's udder
- Both the mare and foal should be evaluated, as maternal health problems commonly contribute to nursing difficulties
- Early veterinary diagnosis and supportive care can help prevent dehydration, hypoglycemia, sepsis, and other life-threatening complications
- Close monitoring during the first weeks of life helps owners recognize nursing problems early and improve the foal's prognosis
References
- McKinnon. A. O. et al. Equine Reproduction. Wiley-Blackwell. 2010.
- Pirinen. N. et al. Motor Development of Stable Born Healthy Foals during the First 24 Hours. Journal of Equine Veterinary Science. 2024.
- Geor. R. J. Ed. Equine Applied and Clinical Nutrition: Health, Welfare and Performance. Saunders Elsevier. 2013.
- Nutrient Requirements of Horses: Sixth Revised Edition. National Academies Press, Washington, D.C. 2007.
