When to Call the Vet: Early Warning Signs in Newborn Foals

Wondering when to call the vet for your foal? Learn the early warning signs in newborn foals so you never have to second-guess a neonatal emergency.

Welcoming a newborn foal is a joyful experience, but it can also bring worry when you’re unsure what’s normal and what might signal a problem. Many foal owners know the anxious feeling of wondering if they should call the vet or wait a little longer. The truth is, acting quickly can make all the difference in protecting your foal’s health and future. This blog will walk you through warning signs, risk factors, and common neonatal disease conditions. Also, provide simple guidelines so you can feel confident knowing exactly when it’s time to call the vet.

Recognizing early red flags in foals can be the difference between a minor concern and a life-threatening emergency. Below are some of the most important warning signs that mean it’s time to call your veterinarian without delay:

• Weak foal, delayed time to stand and nurse (>2-3hours), poor or abnormal suckle reflex, or abnormal suckle behavior: These are all signs of an abnormal foal at birth. There might already be an infection or developmental issues that, left untreated, can lead to failure of passive transfer and secondary infection.
• Domed head, silky haircoat, small size: Signs of a premature foal.
• Respiratory distress– rapid, shallow breathing.
• Colic, rolling, lying upside down with legs curled up, tail flagging, straining to defecate: Unlike adult horses, foal colic can progress very quickly and is often related to serious conditions such as meconium impaction, ruptured bladder, or infection.

• Milk from the nose after nursing – Milk coming from the nostrils usually indicates a swallowing problem or a congenital defect, such as a cleft palate. Because this can lead to aspiration pneumonia, it is always an emergency.
• Reduced nursing – Foals should nurse vigorously 5-7 times per hour. A foal that nurses less frequently or with poor effort is often sick, dehydrated, and at risk for failure of passive transfer.
• Angular/Flexural limb deformities – Bowed, crooked, or unstable legs can affect a foal’s ability to stand and nurse normally. Some mild cases may improve with time, but moderate to severe deformities require veterinary guidance to avoid long-term soundness issues.
• Diarrhea – Newborns should not have diarrhea. Persistent or watery diarrhea may signal infection or sepsis. Left untreated, foals can become dangerously dehydrated within hours and have an increased chance of nonsurvival.
• Abnormal umbilicus– An umbilicus that is wet, enlarged, swollen, hot, or painful is a sign of an umbilical infection or patent urachus.

If you notice any of these warning signs in your foal, don’t wait and see. These are emergencies that require a veterinarian’s immediate attention. Early intervention saves lives and reduces the cost of treatment.

Certain conditions around birth can put a foal at higher risk for illness, even before the first warning signs appear. Being aware of these risk factors helps owners act quickly and protect their foal’s health from the start.

• Dystocia – A difficult or prolonged delivery can leave a foal weak, oxygen-deprived, or injured. This makes them more vulnerable to infection and other complications. Foals born to dystocia will need a vet check immediately because these foals are prone to dummy foal syndrome, developing failure of passive transfer, and sepsis.
• Intrauterine infection or placentitis – If the mare’s placenta was infected, the foal may be born already compromised and at higher risk for failure of passive transfer and sepsis.
• Poor colostrum quality / dripping milk before birth – When colostrum leaks out before foaling, the mare may not have enough left for the foal, putting them at risk of inadequate antibody absorption (FPT).
• Born unobserved or in a dirty environment – Foals born without supervision or into contaminated environments are more likely to ingest or inhale harmful bacteria, increasing the chance of infections.
• Meconium impaction – If a foal struggles to pass meconium and it goes unnoticed, it may develop painful colic or even secondary infections if not promptly treated.

Understanding these risk factors helps you stay one step ahead, anticipate potential problems, and work closely with your veterinarian to prevent them.

A 2-week-old foal with contracted tendons (an example of a flexural limb deformity) of the front limbs at the level of the carpi. This foal responded well to treatment with bandaging and splinting by the veterinarian.

Even with the best care, foals can face certain health challenges in their first days of life. Below are some of the most common neonatal conditions every owner should be familiar with:

• Failure of Passive Transfer (FPT) – FPT is inadequate IgG concentrations, which increases the foal’s risk of infection. Normal is an IgG >800mg/dL. FPT occurs secondary to mare, foal, and colostrum factors. Performing an IgG test within the first 12-24 hours can confirm FPT and guide treatment.
• Dummy Foal Syndrome – Also called neonatal maladjustment syndrome, these foals demonstrate a wide range of clinical signs. Some signs include abnormal nursing and udder seeking behavior, poor suckle reflex, and weakness. There are two types of this disease. One type is from oxygen deprivation during birth.
• Meconium Impaction – When the foal’s first manure doesn’t pass normally, it can cause painful colic and straining. Enemas are often needed to help resolve the blockage safely.
• Diarrhea (infectious causes) – Pathogens like rotavirus, Salmonella, or Clostridium can cause severe diarrhea in foals. Because dehydration and sepsis set in quickly, this is always considered an emergency.
• Sepsis – A life-threatening bloodstream infection, sepsis is the leading cause of death in newborn foals. Early signs may be vague and subtle. Common signs are weakness, poor nursing, and abnormal gum color. Rapid diagnosis and aggressive treatment are critical for survival.
• Congenital or Developmental Issues (e.g., milk from the nose) – Conditions like cleft palate or other structural abnormalities can cause milk to come from the foal’s nostrils. These require immediate veterinary assessment to prevent aspiration pneumonia.
• Angular/Flexural Limb Deformities – Crooked or bowed legs may be seen at birth or develop over time. Some mild cases correct naturally, but moderate to severe deformities often need veterinary intervention to protect future soundness.
• Premature Foal – Foals born premature may appear small, weak, with silky coats and domed heads. These foals can have incomplete ossification of the cuboidal bones (underdeveloped joints), which, if severe enough, require specific weight-bearing restrictions. These foals often need intensive monitoring and veterinary support to survive and thrive.
• Omphalitis aka naval ill– Umbilical infection.

Because these conditions can worsen rapidly, recognizing them early and calling your veterinarian right away gives your foal the best chance at a healthy outcome.

Daily observation is one of the most powerful tools a foal owner has to protect their newborn foal. Watching your foal’s behavior, appetite, nursing frequency, posture, and energy level can reveal subtle changes before illness becomes severe.

Monitor these behaviors in your foal:

• Nursing– The foal should nurse 5-7 times an hour. The foal should nurse vigorously and have a strong suckle.
• Energy levels– The foal should be vigorous, spend time playing, and have zoomies. The foal should spend time exploring its environment. Foals will have small bursts of sleep several times per hour. A foal spending most of its time down and only standing for 1-2 minutes is not normal.
• Defecation and passage of meconium– You should observe the passage of meconium in the first few hours after the foal’s birth. Daily observations should include monitoring that the foal’s butt and tail are clean, no tail flagging, no straining, or diarrhea.
• Urination– Observe that the foal is urinating normally. The color of the urine should be a clear yellowish (meaning it is dilute). Look at the umbilicus when the foal urinates, to make sure you do not see urine coming from the umbilicus.
• Joints/Soundness– Observe that there is no joint swelling, heat, or pain. Observe there is no lameness.
• Umbilicus- The umbilicus should be dry, retracted, and getting smaller. There should be no heat, swelling, pain, moisture, or discharge.
• Eyes and nose– The eyes and nose should be clear. There should be no milk from the nose after nursing. There should be no cloudiness to the eyes, and the eyelids should not be rolled inward.

Your foal’s first days are precious, and recognizing the difference between normal newborn behavior and warning signs of illness can save valuable time. No foal owner should ever feel uncertain or afraid of making the wrong call.

By knowing when to call the vet and what early signs to watch for, you can act quickly with confidence and give your foal the best chance at a healthy future. Trust your instincts, lean on these guidelines, and never hesitate to reach out to your veterinarian when something doesn’t seem right.

If the mare has not passed her placenta in 3 hours, if she is rejecting the foal, and if she has signs of colic or has not defecated in 24 hours.

Neonatal Foal Behavior- What’s Normal? – FoalTimeVet