The arrival of a new foal is one of the most exciting moments in any breeding year. But the first 24 hours of a foal's life are also among the most critical. A thorough examination of the newborn foal by an experienced equine vet can identify problems early, when intervention is most effective, and give you confidence that your foal has the best possible start in life.
At Avonvale Equine Vet Practice, we offer dedicated newborn foal examinations as part of our comprehensive stud medicine and breeding services. In this guide, we outline what a neonatal examination involves, the key milestones to watch for, and the warning signs that should prompt an immediate call to your vet.
Why Is a Newborn Foal Examination So Important?
Foals are born in a relatively immature state compared to many other species. Their immune systems are not yet functional at birth — they rely entirely on antibodies absorbed from their dam's colostrum (first milk) in the first few hours of life to provide protection against infection. At the same time, a range of conditions can affect newborn foals that, if undetected, can deteriorate rapidly.
Early veterinary examination allows us to assess the foal's overall health, confirm that critical milestones have been met, check for congenital abnormalities, and test whether the foal has received adequate passive immunity from the colostrum. Identifying and addressing problems within the first 12–24 hours is far more straightforward — and far more likely to result in a positive outcome — than dealing with a foal that has become seriously ill.
The Rule of Ones: Key Milestones in the First Hours
In the hours following birth, there are three key milestones every owner should be aware of, known as the 'Rule of Ones':
- Within 1 hour — Standing: The foal should be attempting to stand and successfully on its feet within one hour of birth. A foal that is slow to rise or unable to stand may be weak, injured, or suffering from a neurological problem.
- Within 2 hours — Suckling: The foal should be nursing from the mare within two hours. Early colostrum intake is essential — the window for passive transfer of antibodies begins to close within 12 hours of birth.
- Within 3 hours — Passing meconium: The foal should pass its first droppings (meconium) within three hours. Failure to do so may indicate meconium impaction, a common and painful cause of colic in newborn foals.
If your foal has not achieved any of these milestones within the expected timeframe, contact your vet promptly. Do not wait to see if the situation improves on its own.
What Does a Newborn Foal Examination Involve?
Our vets carry out a systematic head-to-toe assessment of the newborn foal, ideally at around 12 hours of age, or before if there are any concerns. The examination covers the following areas:
- General demeanour and vital signs — Heart rate, respiratory rate, temperature, and mucous membrane colour are assessed to give an overall picture of the foal's condition.
- Eyes — Examination for entropion (inturned eyelids), uveitis, and other ocular conditions common in neonatal foals.
- Mouth and palate — Checking for cleft palate and assessing the foal's suck reflex, which is an important indicator of neurological function.
- Cardiovascular system — Auscultation of the heart to detect murmurs. A patent ductus arteriosus is common in the first day or two and usually resolves without intervention.
- Respiratory system — Checking for normal lung sounds and assessing breathing pattern. Respiratory distress in a newborn foal is always a cause for concern.
- Umbilicus — The umbilical stump is examined for signs of a hernia, infection or a patent urachus (urine leaking from the navel). Proper navel dipping with antiseptic immediately after birth is strongly recommended.
- Limbs and musculoskeletal system — Assessment of limb conformation and joint laxity or contracture. Many angular and flexural limb deformities are more easily manageable if identified early.
- Gastrointestinal tract — Checking for passage of meconium and signs of colic. Enemas may be administered if retention is suspected.
- Urogenital system — Confirming normal urination and checking for ruptured bladder, which can present subtly in the first few days of life.
- IgG (passive transfer of immunity) testing — A blood test to measure the level of antibodies absorbed from the colostrum. Failure of passive transfer (FPT) leaves the foal highly vulnerable to infection and requires prompt treatment.
- SAA testing – this can help in the early identification of foals at risk of sepsis, before signs of illness become evident
Failure of Passive Transfer
One of the most important things we test for in newborn foals is failure of passive transfer (FPT). Foals are born with essentially no circulating antibodies and depend entirely on absorbing immunoglobulins (IgG) from the mare's colostrum in the first 12–18 hours of life.
FPT occurs when a foal does not receive or absorb sufficient colostrum, leaving it with dangerously low levels of antibody protection. This may happen because the mare ran milk prior to foaling, the foal was slow to stand and suckle, or the colostrum was of poor quality.
We test for FPT using a simple, rapid foal-side blood test. If IgG levels are insufficient, treatment can be provided — either via stomach tubing with additional colostrum if the foal is less than 18 hours old, or by intravenous plasma administration if the window for gut absorption has closed. Both treatments are highly effective when given promptly.
Important: The gut's ability to absorb antibodies from colostrum decreases rapidly after birth and is essentially closed by 18–24 hours of age. If you have any concern that your foal has not suckled adequately, call your vet without delay — every hour counts.
Common Conditions in Newborn Foals
In addition to FPT, our vets are experienced in diagnosing and managing a number of other conditions in neonatal foals:
- Neonatal maladjustment syndrome (NMS) — Also known as 'dummy foal syndrome', NMS describes neurological signs including loss of suck reflex, wandering, and failure to bond with the mare. Many affected foals recover fully with supportive care.
- Meconium impaction — Retention of the foal's first droppings, causing straining and colic. Usually responsive to enemas but occasionally requires veterinary intervention.
- Septicaemia — Bacterial infection in the bloodstream, often secondary to FPT. A leading cause of illness and death in foals in the first week of life. Early treatment is essential. An SAA test carried out at the new foal check can help to identify at-risk individuals.
- Joint ill (septic arthritis) — Infection of one or more joints, often following umbilical infection or septicaemia. Early diagnosis and aggressive treatment are critical to preserve long-term joint function.
- Ruptured bladder — More common in colts, presenting as a distended abdomen and dullness in the first few days of life. Surgical repair is required and is generally very successful if carried out promptly.
- Limb deformities — Angular and flexural limb deformities are common in newborn foals. Many mild cases resolve with controlled exercise, while more significant cases may require splinting or surgical intervention.
- Entropion — Inturned eyelids that cause eyelashes to rub on the cornea. A simple and very common condition in newborn foals that is easily treated by a vet with expertise in foal management.
Preparing for Foaling: Tips for Owners and Stud Managers
Good preparation before foaling can make a significant difference to the outcome for both mare and foal. We recommend the following:
- Vaccinate the mare against EHV — Vaccination in the 5th, 7th and 9th months of pregnancy boosts reduces the risk of abortion. Vaccination against rotavirus is also available, which boosts the antibody content of the colostrum, giving the foal maximum protection.
- Have your vet's number to hand — Know who to call in an emergency. Our 24-hour emergency line is available 365 days a year.
- Monitor the mare closely as foaling approaches — Watch for waxing of the teats, relaxation of muscles around the tail head, and changes in udder development. Foal watch cameras are invaluable.
- Prepare a foaling kit — Include clean towels and an antiseptic for navel dipping, a foal enema and a thermometer. Having a store of frozen colostrum from mares that have previously foaled and produced good quality colostrum can be invaluable.
Call us and speak to one of our experienced stud vets if you have any queries
When to Call the Vet Urgently
While many foals are born healthy and require nothing more than monitoring, the following signs should always prompt an immediate call to your vet:
- Foal not standing within one hour of birth
- Foal not suckling within two hours of birth
- Foal not passing meconium within three hours
- Mare not passing the placenta within three hours
- Signs of colic, straining or a distended abdomen
- Laboured or rapid breathing
- Dull, depressed or unresponsive behaviour
- Swollen, hot or painful joints
- Discharge, heat or swelling around the navel
- Urine leaking from the navel
- Foal being rejected by the mare
Newborn Foal Care at Avonvale Equine
At Avonvale Equine, we understand that each foal represents an enormous investment — financial, emotional, and in terms of time and care. Our experienced equine vets are passionate about giving every foal the best possible start in life, and we are always happy to provide guidance and support throughout the foaling season.
As part of our Stud Medicine and AI services, we offer complete neonatal care from foaling support and examination through to ongoing health monitoring in the first critical weeks of life. Whether you are a first-time breeder or a busy commercial stud, our team is here to help.
Contact Us
Phone: 01295 670501
Email: reception@avonvaleequine.co.uk
Address: The Churns, Home Farm Drive, Upton, Banbury, OX15 6HU
Office hours: Monday to Friday, 8:30am – 5:00pm. 24-hour emergency line available.
