Foaling: Signs of Labor, the Stages, and a Foaling Kit

Author: Elliott Garber, DVM

Most mares foal quietly, at night, and without help, but the small window when things go wrong is the reason experienced breeders sit up watching. The signs a mare is close include a filling udder over the final weeks, a waxy plug at the teat ends 24 to 48 hours out, relaxed muscles around the tailhead, and restlessness or sweating as labor begins. Once the water breaks, active foaling is fast: the foal is normally out within 20 to 30 minutes. If it stalls, if you see a red velvety membrane appear first, or if the presentation looks wrong, treat it as an emergency and call your veterinarian immediately.

Signs your mare is getting close

There is no single reliable countdown clock for foaling, which is why breeders watch a stack of small changes rather than any one sign. Taken together they tell you the window is opening.

The clearest change is the udder. A mare usually begins to bag up about four to six weeks before foaling, and in the final two weeks the udder stays distended rather than fluctuating through the day, according to Michigan State University Extension. As foaling nears the teats, once flat, swell and start to tip slightly outward as they fill. Many mares then develop a yellowish, waxy plug of dried colostrum at the teat ends, called waxing. Around 70 percent of mares wax, and most of those foal within the next 24 to 48 hours, so it is a useful but not perfect signal, as the Colorado State University Equine Reproduction Laboratory notes. Some mares also drip or stream milk before foaling, which is worth flagging to your vet because it can mean lost colostrum.

The other changes are muscular. In the last two to three weeks the belly drops as the abdominal muscles relax, and in the final week the ligaments and muscles around the pelvis and tailhead soften, so a hollow appears on either side of the root of the tail. When actual labor is close, most mares become restless, pace, paw, look at their flanks, sweat behind the elbows and along the flanks, and may pass small amounts of manure repeatedly. Because the signs are variable, some breeders test the calcium in mammary secretions or use a foaling-alert monitor, but nothing replaces a person checking on the mare.

A steady eye is easier when the mare’s due window is written down rather than remembered. If you tracked the breeding date, our horse gestation guide explains the roughly 11 month (about 340 day) average and the wide normal range, and you can keep the covering date and expected window on the mare’s profile so everyone watching is working from the same date. Reminders for pre-foaling steps live under reminders and upcoming care.

The three stages of labor

Foaling is described in three stages, and knowing what normal looks like is what lets you tell a routine birth from an emergency.

Stage 1: getting ready

Stage one is the onset of contractions and the positioning of the foal. It generally lasts one to two hours and is the restless phase: pacing, pawing, sweating, getting up and down, looking at the flank. This stage ends with the rush of fluid when the outer sac (the allantois) breaks, per AQHA’s stages of labor. Give the mare quiet and space here. Some mares will stall stage one if disturbed, then resume when left alone, so watch from a distance if you can.

Stage 2: active foaling, and it is fast

Stage two is the delivery of the foal, and the single most important thing to understand is that it is quick. Once the water breaks, the foal should normally be delivered within 20 to 30 minutes, and CSU and AQHA both flag that going much past 30 minutes usually means a problem. A normal presentation looks like a diver: two front feet appear first, one slightly ahead of the other, soles down, with the nose resting on the legs, inside the pale bluish-white amniotic sac.

Because stage two is so fast, a stall is an emergency, not a wait-and-see. If more than about 20 to 30 minutes pass with hard straining and no progress, if you see only one foot or the soles pointing up or a nose with no feet or a tail first, or if you see the red membrane described below, call your veterinarian immediately and do not delay. A malpositioned foal can rarely be fixed at home and every minute counts for both mare and foal. Do not pull unless a veterinarian directs you, and never pull against the mare or at an odd angle.

Stage 3: the placenta

Stage three is passing the fetal membranes (the placenta). The mare should pass the entire placenta within about three hours of foaling. Do not pull on hanging membranes, which can tear and leave a piece behind; instead tie them up above the hocks so the mare does not step on them and so you can lay the placenta out to check it is complete once passed. A placenta retained beyond roughly three hours is a genuine emergency: even a small retained tag can lead to serious infection and laminitis, so call your vet, as Merck Animal Health and CSU both emphasize.

The red bag: a true foaling emergency

The most dangerous foaling emergency you can see is a “red bag” delivery. Normally the first thing to appear at the vulva is the pale, translucent, bluish-white amniotic sac. In a red bag delivery the placenta has separated from the uterus too early, and instead of the pale sac you see a thick, red, velvety membrane emerging first. That red membrane is the chorioallantois, and its appearance means the foal has lost its oxygen supply from the mare, according to the CSU Equine Reproduction Laboratory.

A red bag will not break on its own the way the normal water bag does. If you see red velvet appear first, this is one of the few moments where you act before the vet arrives: call your veterinarian immediately, and while you wait, tear or cut through that membrane at once to reach the foal inside and get it delivered as fast as possible, because oxygen deprivation is happening in real time. Knowing the difference between pale (normal) and red (emergency) at the vulva is the single most valuable thing an attendant can carry into the foaling stall.

The 1-2-3 rule for the newborn foal

Once the foal is out, healthy foaling follows a simple, memorable timeline that the AAEP and the CSU Equine Reproduction Laboratory call the 1-2-3 rule. Any deviation is a reason to call your vet.

• 1 hour: the foal should stand. A healthy foal makes its first wobbly attempts within about 30 minutes and is usually up within an hour. A foal that cannot stand by an hour or so needs veterinary attention.
• 2 hours: the foal should nurse. The foal should find the udder and be nursing within about two hours. This matters enormously, because the mare’s first milk, colostrum, carries the antibodies the foal is born without. Foals cannot absorb those antibodies from the gut for long, so a foal that has not nursed good colostrum in the first hours is at real risk of failure of passive transfer and infection. If the foal is not nursing by two hours, call your vet.
• 3 hours: the mare should pass the placenta. As above, membranes retained past about three hours are an emergency.

Do not rush to intervene while the timeline is on track. Let the foal break the sac itself (or clear its nostrils if the membrane covers its face and it does not tear free), let the umbilical cord break naturally when the mare or foal moves rather than cutting it, and let the pair bond. Wait to handle the foal until it has stood and nursed, then move to the newborn care steps below.

Newborn care: navel, colostrum, and the vet check

Two hands-on jobs fall to you soon after birth. First, treat the navel. The umbilical stump is a direct route for bacteria into the foal, so once the cord has broken, dip or spray the stump in a dilute antiseptic solution (a dilute iodine or a chlorhexidine solution are the usual choices), and repeat as your vet advises over the first day. Use the strength your vet recommends, because a solution that is too strong can irritate the tissue.

Second, make sure the foal actually gets colostrum. Watch that it is nursing effectively and not just bumping around the udder. If the mare has been streaming milk for days, if she rejects the foal, if the foal is weak, or if this is a maiden or sick mare, the colostrum may be inadequate and your vet may want to test the foal’s antibody (IgG) level or supplement with banked colostrum. This is a veterinary decision, not a home fix.

Plan on a veterinary newborn exam in the first 12 to 24 hours regardless of how smooth the birth was. The vet checks the foal over, confirms it has passed meconium (its first manure), and typically draws blood to measure IgG so a passive-transfer failure can be caught and corrected early. Record the foaling date, birth weight if you have a scale, the navel treatment, and the vet exam on the foal’s health and medical records, and add the foal as its own animal so its record starts on day one. Our help center walks through adding an animal and adding a record.

A foaling kit checklist

Assemble the kit weeks ahead and keep it in a clean, closed container near the foaling stall so you are not hunting for supplies at 2 a.m. A practical kit includes the following.

• Your veterinarian’s phone number and after-hours line, posted where you can see it
• A dilute antiseptic for the navel (dilute iodine or chlorhexidine) and a small clean cup to dip into
• Clean towels for drying and handling the foal
• A tail wrap for the mare and roll cotton or clean gauze
• A mild soap and warm water to wash the mare’s perineum and udder if needed
• Obstetric or long disposable gloves
• A watch or phone with a timer so you can actually clock the stages and the 1-2-3 rule
• A flashlight or headlamp and spare batteries
• A clean bucket, plus twine to tie up hanging membranes and a plastic bag or bin to save the placenta for your vet to inspect
• An enema (only if your vet has told you to keep one on hand for a foal that has not passed meconium)
• A thermometer
• A halter and lead for the mare
• Clean, dry bedding and a way to keep the foaling area draft-free

Notice what is not on this list: no drugs, no injectable oxytocin, no home remedies. Foaling medications and any decision to intervene medically belong to your veterinarian. The kit exists so you can keep things clean, keep time, and get help fast, not so you can treat an emergency yourself.

Bringing it together

The best foaling outcomes come from preparation and from knowing the difference between normal and not. Learn the pre-foaling signs so you are present, understand that stage two is fast so a stall is an emergency, recognize a red bag on sight, and hold the newborn to the 1-2-3 rule. When any of those lines is crossed, the right move is always the same: call your veterinarian without waiting. Keep the mare’s due window, the foaling notes, and the foal’s first records together on the horse species hub so the whole picture, from breeding to birth to the newborn exam, lives in one place. If you are still choosing a barn name for the new arrival, the horse name generator is a fun place to start once mare and foal are safe.

Frequently asked questions

How long does foaling take?

Early labor (stage one) usually runs one to two hours. Once the water breaks, active foaling (stage two) is fast, normally 20 to 30 minutes to deliver the foal. The placenta (stage three) should pass within about three hours. If active foaling stalls past roughly 30 minutes, call your vet immediately.

What is the 1-2-3 rule for a newborn foal?

The foal should stand within about 1 hour, nurse within about 2 hours, and the mare should pass the placenta within about 3 hours. Any deviation from that timeline is a reason to call your veterinarian.

What is a red bag delivery?

It is premature separation of the placenta. Instead of the normal pale, translucent water bag, a thick red velvety membrane appears first at the vulva. The foal is losing oxygen, so you call the vet immediately and tear open the red membrane at once to deliver the foal fast.

Do I need to cut the umbilical cord or break the sac?

Usually no. Let the cord break naturally when the mare or foal moves, and let the foal break the amniotic sac itself. Step in only to clear the membrane off the foal’s nostrils if it has not torn free and the foal cannot breathe. Then dip the navel stump in a dilute antiseptic.

Should I be there when my mare foals?

Ideally yes, or at least monitoring closely, because the emergencies (a stalled stage two, a wrong presentation, a red bag, a retained placenta) all turn on minutes. Most mares foal fine on their own, but attendance is how the rare disaster gets caught in time.

Do this next on Creatures

Whether you are dialing in day-to-day care, planning a breeding, or shopping for your next horse, Creatures is the records, marketplace, and directory layer to do it in one place.