Foal Care Basics for New Owners

Bringing a newborn foal into the world is a rewarding experience, but it also carries significant responsibility. The first hours, days, and weeks of a foal’s life lay the foundation for a sound, healthy adult horse. For first-time breeders or owners, understanding the pillars of foal care (colostrum, neonatal examinations, parasite control, and weaning) is essential. This article provides a clinically grounded overview of foal care basics for new owners, referencing guidelines from the American Association of Equine Practitioners (AAEP), the Merck Veterinary Manual, and equine research from institutions such as Kentucky Equine Research. Regional variations in disease prevalence and management practices are noted for owners in North America, the United Kingdom, Europe, and Australia.

Quick Q&A

Question: How soon after birth should a foal receive colostrum, and why is it critical?

Answer: A foal should receive colostrum within the first 2 hours of life, ideally within the first hour. Colostrum provides maternal antibodies (immunoglobulin G, IgG) that are essential for passive immune transfer, as the foal’s immune system is immature at birth. Failure of passive transfer significantly increases the risk of life-threatening infections.

Immediate Postpartum Care

The immediate postpartum period (first 12 to 24 hours) is the most critical window for foal survival. Owners should ensure the mare and foal are in a clean, dry, and draft-free environment. The following steps should be observed:

• Ensure the foal breathes spontaneously: The foal should be breathing within minutes after delivery. If there is any delay, clear the airways by gently wiping the nostrils and mouth with a clean cloth.
• Allow the mare to bond and clean the foal: Interference should be minimal unless the mare is ill or rejecting the foal.
• Umbilical care: Dip the umbilical stump in a diluted antiseptic solution (such as 2% chlorhexidine) immediately after birth, then repeat every 2 to 4 hours for the first 24 hours. This reduces the risk of navel ill (omphalophlebitis), a potentially fatal infection. According to the Merck Veterinary Manual, proper umbilical antisepsis is a cornerstone of neonatal hygiene.

Colostrum and Passive Transfer of Immunity

Colostrum is the first milk produced by the mare, rich in antibodies (immunoglobulin G, IgG) and other immune factors. The foal’s gut is most permeable to these large molecules during the first 12 hours of life, with peak absorption occurring within the first 2 hours.

Assessment of Colostrum Quality

The AAEP recommends that foaling attendants assess colostrum quality using a colostrometer or a Brix refractometer. A Brix reading of 20% or higher indicates good colostrum quality. If the mare’s colostrum is of poor quality (e.g., from premature lactation, leaky bag, or the mare’s illness), a frozen colostrum bank or a commercial colostrum substitute should be administered.

Monitoring Passive Transfer

A blood sample should be taken from the foal at 18 to 24 hours of age to measure serum IgG levels. A level of 800 mg/dL or above indicates adequate passive transfer; 400 to 800 mg/dL is considered partial failure; below 400 mg/dL is considered failure of passive transfer. Owners should work with their veterinarian to decide on plasma transfusion if IgG is low.

Regional Considerations

In Australia and other warmer climates, environmental bacterial load is higher, making failure of passive transfer even more dangerous. In the United Kingdom and Europe, where thoroughbred breeding is common, routine IgG testing is standard practice.

Early Veterinary Checks and Neonatal Assessments

A thorough veterinary examination within the first 24 hours is recommended for every foal. The AAEP guidelines for the equine neonate include:

• Physical examination: Assessment of heart rate, respiratory rate, mucous membrane colour, and rectal temperature (normal: 37.5 to 38.5°C / 99.5 to 101.5°F). The foal should pass the first meconium stool within 2 to 4 hours postpartum.
• Ophthalmologic examination: To check for congenital cataracts or other eye defects.
• Orthopedic screening: Assess for angular limb deformities, flexural deformities, or other conformation issues that may require early intervention.
• Umbilical and umbilical artery check: Palpation to ensure the umbilicus is not swollen or painful.
• Respiratory and gastrointestinal auscultation: To detect murmurs or abnormal gut sounds.

Follow-up Checks

A second veterinary visit at 48 to 72 hours is often recommended, especially if the foal shows any signs of lethargy, diarrhoea/diarrhea, or decreased nursing. The horse.com (The Horse) emphasises that early detection of sepsis, which can manifest as depression or a weak suckle reflex, dramatically improves outcomes.

Nutrition and Growth

The foal’s nutritional needs change rapidly during the first year.

Milk and Creep Feeding

The mare’s milk is the primary nutrition for the first 2 to 3 months. After that, milk production declines and the foal’s growth demands increase. Kentucky Equine Research advises introducing creep feed (a highly palatable, balanced ration specifically formulated for foals) at around 3 to 4 months of age. Creep feeding reduces weaning stress and supports consistent growth.

Water and Minerals

Foals should have access to fresh water from birth. A salt block and free-choice minerals (formulated for growing horses) should be provided. In regions with mineral deficiencies (e.g., selenium deficiency in parts of the Midwest US, eastern Australia, and parts of Europe), the veterinarian may recommend a commercial supplement or a single injection of selenium/vitamin E after birth. Consultation with a local veterinarian is essential to avoid toxicity.

Deworming and Parasite Control

Parasite management begins in the first few weeks of life. Foals are highly susceptible to ascarid (roundworm) infections and tapeworms. The AAEP’s Parasite Control Guidelines recommend:

• First deworming at 8 weeks of age with an agent effective against ascarids (e.g., fenbendazole or pyrantel). However, some veterinarians start earlier (4 to 6 weeks) in high-risk environments.
• Fecal egg count monitoring from 6 weeks onward to guide deworming frequency. In regions with heavy ascarid burdens (e.g., Australia, the US Southeast), more frequent treatment may be needed.
• Rotation of anthelmintic classes to delay resistance. Fenbendazole, ivermectin, moxidectin, and praziquantel are common active ingredients, but resistance has been reported in Parascaris equorum.

Regional Differences

• Australia and New Zealand: High prevalence of strongyles and ascarids; faecal worm egg counts are standard before each treatment, as recommended by the Australian Veterinary Association (AVA).
• Europe: Tapeworm infection (Anoplocephala perfoliata) is more common in temperate regions; praziquantel is often included in the rotation for horses older than 6 months.
• North America: The AAEP recommends twice-yearly faecal egg counts for adult horses, but foals should be tested more frequently.

Weaning Strategies and Considerations

Weaning is a major stressor for both mare and foal. Poorly managed weaning can lead to weight loss, behavioral issues (e.g., cribbing or weaving), and increased susceptibility to disease.

Timing

Most foals are weaned between 4 and 6 months of age. Earlier weaning (3 to 4 months) may be necessary if the mare has health problems, but it requires a higher level of nutritional and behavioral management. Later weaning (6 to 7 months) is more natural, but owners must ensure the mare does not become underconditioned.

Methods

The two most common weaning strategies are:

1. Gradual weaning: The mare is separated for increasing periods each day, eventually reaching full separation over 2 to 3 weeks.
2. Abrupt weaning: The foal is moved to a separate stable or paddock, often with a companion (another foal or a gentle older horse) to reduce stress.

The AAEP and many equine behavior specialists prefer gradual weaning when possible, as it allows the foal to adjust without a sudden emotional and nutritional disruption.

Post-weaning Care

• Continue creep feeding.
• Provide constant access to fresh hay and water.
• Monitor body weight weekly. A weaning weight check by a veterinarian at 6 and 12 months is recommended.
• Weanlings should receive their second full set of core vaccinations (tetanus, Eastern and Western equine encephalomyelitis, West Nile, rabies) at approximately 6 months of age, based on regional risk and initial vaccine timing.

Common Health Concerns in Neonatal Foals

New owners should be vigilant for signs of illness. The most common conditions include:

• Neonatal maladjustment syndrome (NMS): Also called “dummy foal,” presenting with disorientation, weak suckle, and lack of bonding. Veterinary intervention and intensive care are required.
• Septicemia: Fever (temperature above 39.2°C / 102.5°F), depression, and cloudiness in the eyes (uveitis) are red flags. Blood culture and antibiotic therapy are critical.
• Diarrhoea/diarrhea: Can stem from nutritional causes, bacterial infections (e.g., Clostridium perfringens), or rotavirus. In the United Kingdom and Europe, rotavirus outbreaks in breeding farms are common; vaccination of mares before foaling is recommended.
• Joint ill (septic arthritis): Infection of the joints, often secondary to navel infections. Signs include lameness, heat, and swelling in one or more joints.
• Respiratory infections: Especially in foals that fail to transfer passive immunity. Tachypnea, nasal discharge, and cough require immediate veterinary assessment.

Regional Considerations for Foal Care

North America

• Strangles (Streptococcus equi) vaccination may be considered in endemic areas, but the vaccine is not universally recommended for neonates due to potential adverse reactions. Consult a veterinarian.
• Tick-borne diseases: In regions such as the northeastern US and parts of Canada, ticks can transmit Anaplasma phagocytophilum or Lyme disease. Foals are less commonly affected, but tick control in pastures is important.

United Kingdom and Europe

• Foot-and-mouth disease and equine infectious anaemia: Strict biosecurity is enforced in breeding establishments, but these are not routine concerns for most private owners.
• UK’s National Equine Welfare Council (NEWC) provides guidelines for foal vaccination and worming, aligning with the primary course of equine influenza and tetanus from 6 months of age.
• Tapeworm control is more frequently extended to foals in Europe due to high pasture contamination.

Australia and New Zealand

• Australia is free from many diseases (e.g., rabies, equine infectious anemia), but Hendra virus is a significant concern in some areas. Vaccination of mares before foaling may be considered on a case-by-case basis.
• Australian Veterinary Association (AVA) guidelines stress the importance of early colostrum assessment and frequent worm egg counts due to high helminth loads in warm, moist climates.
• Equine herpesvirus (EHV-1) outbreaks have occurred in Australia; foals may be vaccinated starting at 5 months of age.

Conclusion

Foal care basics for new owners encompass a proactive approach to colostrum, veterinary oversight, nutrition, parasite control, and weaning. By following the evidence-based recommendations of the AAEP, the Merck Veterinary Manual, and regional veterinary associations, owners can significantly improve the health and welfare of their foals. Always work closely with a veterinarian to develop a personalised plan tailored to the specific environment, breed, and health status of the mare and foal.

For further reading, consult the AAEP’s “Neonatal Foal Care” guidelines available at aaep.org, and the “Foal Care” section of the Merck Veterinary Manual.

References

[1] American Association of Equine Practitioners. (2020). AAEP Guidelines for Examination and Care of the Foal. Retrieved from aaep.org. [2] Merck & Co., Inc. (2023). Management of the Newborn Foal. In The Merck Veterinary Manual Online. Retrieved from merckvetmanual.com. [3] Kentucky Equine Research. (2021). Foal Nutrition and Growth. Retrieved from ker.com. [4] The Horse Media Group. (2019). Foal Care: The First 24 Hours. TheHorse.com. [5] Australian Veterinary Association. (2022). Equine Parasite Control Guidelines for Foals. Retrieved from ava.com.au. [6] Federation of Veterinarians of Europe. (2021). Vaccination and Health Management of Foals. Brussels: FVE Publications. [7] National Equine Welfare Council (UK). (2020). Code of Practice for the Care of Foals. NEWC. [8] Canadian Veterinary Medical Association. (2019). Neonatal Foal Care: A Practitioner’s Guide. CVMA. [9] American Veterinary Medical Association. (2021). Equine Neonatal Medicine. AVMA.