Post-foaling warning signs put focus on mare and foal triage

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A fresh clinical explainer from The Horse is drawing attention to a familiar but high-stakes reality in equine practice: the hours immediately after foaling can shift from normal to life-threatening with very little warning. The article, “Post-Foaling Red Flags,” by Christa Lesté-Lasserre, outlines 10 emergencies that warrant immediate veterinary attention in mares and foals, including retained fetal membranes, postpartum hemorrhage, trauma, weakness, failure to nurse, and inadequate transfer of maternal antibodies. (thehorse.com)

That focus reflects longstanding equine reproductive medicine guidance. In mares, parturition is expected to move quickly, and abnormalities tend to be treated as emergencies because prolonged or difficult delivery can threaten both the mare and foal. Merck Veterinary Manual notes that in normal foalings, most newborn foals are sternal within 1 hour, stand within 2 hours, and nurse within 3 hours. Separate AAEP proceedings indicate that placental retention beyond roughly 3 hours after foaling is considered abnormal, a threshold widely used in practice because of the risk of metritis, endotoxemia, and laminitis. (merckvetmanual.com)

The Horse article appears aimed at helping breeders and barn staff recognize when observation is no longer enough. Among the red flags it highlights are foals that do not rise or nurse on time, mares that fail to pass the placenta, and signs that colostral transfer may have failed. The article specifically notes that an IgG reading below 8 g/L is a critical warning sign for inadequate passive transfer. Merck’s neonatal emergency guidance similarly stresses that healthy foals generally attempt to rise within minutes, should stand on their own within about 1 hour, and should nurse by around 2 hours, while a complete veterinary exam at about 12 hours can help identify congenital problems, trauma, or early illness. (thehorse.com)

Broader expert guidance reinforces how narrow the response window can be. Merck states that a vaginal examination is indicated if a foal is not delivered within 30 minutes after rupture of the chorioallantois, and University of Illinois equine emergency commentary describes dystocia as a medical emergency in mares. AAEP educational programming this year has also continued to spotlight postpartum mare exams, first foal exams, and common post-foaling complications, suggesting sustained professional focus on standardizing early recognition and triage. (merckvetmanual.com)

Why it matters: For veterinary professionals, the takeaway isn’t just that post-foaling emergencies happen, but that many are time-defined problems. A mare that has not passed fetal membranes by 3 hours, a foal that has not nursed by 2 to 3 hours, or a neonate with low IgG by early testing may still be salvageable, but only if intervention starts quickly. That makes clear discharge instructions, breeder education, and postpartum checklists especially important in ambulatory and referral practice. The article also serves as a useful reminder that “normal until proven otherwise” is a risky assumption in equine neonatology and broodmare care. (aaep.org)

For practices serving breeding farms, this kind of guidance can support more structured foaling protocols: monitoring for the “1-2-3” milestones, documenting placental passage and integrity, planning early IgG assessment, and setting clear thresholds for when barn staff should call. It also reinforces the value of reviewing dystocia response plans before foaling season, because postpartum crises are often downstream of problems that began during delivery. (merckvetmanual.com)

What to watch: The next step is less about new regulation and more about implementation: whether farms and clinicians tighten postpartum surveillance, standardize early mare-and-foal exams, and use clearer escalation triggers during the first 12 to 24 hours after birth. (merckvetmanual.com)