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Preparing Your Horse for SpringSpringtime—a season we look forward to as equestrians. Riding arenas emerge from their sn...
03/27/2026

Preparing Your Horse for Spring

Springtime—a season we look forward to as equestrians. Riding arenas emerge from their snowy blankets. The sun shines longer and brighter every day. Much-awaited shows and competitions are right around the corner, and we’re eager to shift things into the next gear.

Full of potential, the spring months set the tone for the rest of the year. The key with transitioning from winter to spring is to have a plan in place to tackle your horse’s various seasonal needs. You should think about vaccinating and deworming, of course, but also about rebuilding your equine athlete’s fitness after a winter hiatus.

There’s a lot to accomplish transitioning into spring, so let’s get organized with a checklist:

* Physical exam;
* Bloodwork (if recommended by your veterinarian);
* Dental exam;
* F***l egg count;
* Deworming;
* Spring vaccines—core and risk-based;
* Body clipping (if applicable);
* Sheath cleaning;
* Blanket and tack maintenance/repair;
* Saddle fit evaluation;
* Diet evaluation;
* Spring cleaning and sanitizing;
* Coggins test; and
* Health certificate (aka certificate of veterinary inspection, or CVI) if your horse travels.

The Essentials

Physical and dental exam
“Springtime is a great time to get your equine partner all checked out and ready to roll for the summer,” says Sarah Cohen, DVM, owner of Equity Performance Equine, an ambulatory veterinary practice based in Wellington, Florida. “During a routine annual physical exam, your veterinarian can look for any unnoticed issues in your horse’s heart, eyes, feet, or gastrointestinal tract. This is also an excellent time to perform an oral exam to assess the need for teeth floating as well as identify any fractured teeth or other oral health issues.”

Vaccines
Spring vaccines are a routine part of wellness exams. All horses in the United States should receive the four core vaccines—rabies, teta**s, West Nile virus (WNV), and Eastern/Western equine encephalomyelitis (EEE/WEE)—and then get boosted annually. These boosters are generally given in the spring to maximize protection against WNV/EEE/WEE when mosquitoes, which spread these diseases, emerge in early summer.

Beyond these four, different geographical areas present different equine infectious disease challenges and, therefore, require different immunization protocols. “Veterinary practitioners in your specific areas will know best how to advise you regarding risk-based vaccines and guide you with respect to the needed frequency of vaccination,” Cohen says.

Regions with year-round hot and humid climates—Cohen’s Florida being a prime example—have the added challenge of persisting mosquito populations, warranting biannual vaccination against WNV and EEE/WEE.

In addition to geographic risks, you must consider farm-specific risks. Facilities housing broodmares or frequently traveling show horses, for example, need to provide their horses additional protection (immunization) against influenza and equine herpesvirus (EHV).

Parting words from Cohen about vaccines: “They are safe and inexpensive. Treating a vaccine-preventable disease is both costly and heartbreaking.”

Parasite control

Internal parasites can damage your horse’s internal organs, especially those of the digestive tract. Equine parasitic burdens vary based on the age of the individual, geographical region, and herd immunity, says Constance Gorman, DVM—hence the importance of consulting your veterinarian when formulating a parasite control plan. Gorman is a field care associate at Hagyard Equine Medical Institute, in Lexington, Kentucky, and an FEI treating veterinarian.

The first step in parasite prevention is performing a f***l egg count (FEC) in the spring and fall to see what types of parasites might be living inside your horse, our sources say. When possible, Gorman does an FEC before deworming and again two weeks later to measure the dewormer’s efficacy, a process known as a f***l egg count reduction test.

Identifying and quantifying your horse’s internal parasitic load—rather than deworming willy-nilly—is key to slowing the dewormer resistance problem caused by indiscriminate administration of anthelmintics over several decades. “Individual FEC also allows more informed and more targeted deworming, thus increasing the effectiveness of each treatment,” says Cohen.

The FEC is not foolproof, however. “Tapeworm eggs can be difficult to find, so I recommend deworming every horse at least annually with praziquantel regardless of FEC results,” says Gorman.

Springtime Challenges

Skin issues
April showers bring May pastern sores. When snow melts into mud, many horse owners find themselves dealing with scruffy skin. Damp conditions and long haircoats can leave skin, especially on the legs, at the mercy of trapped bacteria and fungi.

Dermatophilosis (aka rain rot) is a common diagnosis. When caught early, you can usually resolve this skin infection with a couple of thorough scrubby baths, says Cohen, mixing a small amount of dilute povidone-iodine with the shampoo. “In some rare cases of severe dermatophilosis, antibiotics may be prescribed to combat the infection,” she adds.

“With dermatophilosis and similar conditions, daily nursing care is often necessary,” says Cohen. “Otherwise, recurrent skin issues can result in painful sores or even lameness.”

She and Gorman share tips for protecting your horse’s legs from mud and the skin issues it can cause:

* Keep the hair around the pastern clean and dry by brushing or toweling off dirt.
* Dry and groom your horse after heavy rain to reduce bacteria and fungus buildup on the skin.
* Apply ointments only if recommended by your vet, as gooey substances can trap bacteria near the skin.
* Pick your horse’s feet daily to remove rocks packed in with the mud and to check for and manage signs of thrush.

Hoof issues
“Thrush is caused and exacerbated by damp environments common during the spring season and sometimes also by poor hoof hygiene,” Cohen says. “If meticulous hoof care and over-the-counter treatments don’t work or if your horse is footsore or lame, it’s time to call your veterinarian.”

“Additionally, during the spring season hoof growth increases, so farrier upkeep is more important than ever,” Gorman says. “If the hoof has had a chance to overgrow and there are some cracks or separation along the white line area, this gives bacteria a chance to invade the foot and cause painful hoof abscesses.”

Spring grass and diet
With lush spring grass, keep two things in mind: disease prevention and grazing in moderation. Spring is a precarious time for equids prone to obesity, metabolic dysregulation, and the hoof disease laminitis.

As your veterinarian will tell you, limiting metabolically challenged horses’ nonstructural carbohydrate (NSC) intake is essential. Grass consumption can aggravate conditions such as insulin dysregulation, equine metabolic syndrome, and pituitary pars intermedia dysfunction (PPID, formerly equine Cushing’s disease). That’s mainly because fresh grass contains large amounts of the NSCs starch and sugar.

“Grasses, which are naturally high in sugar, generally have an even higher sugar content in the spring and fall,” Cohen says. “And the sugar content in grass actually increases through the day, so the safest time to graze at-risk animals is in the early morning hours.”

Unfortunately, with certain horses, being selective about timing isn’t enough. “For at-risk individuals, it’s safest to stay off the grass entirely,” Cohen says. If that’s not an option, she recommends using a grazing muzzle when putting vulnerable equids on pasture. Research shows that properly fitted grazing muzzles reduce grass intake by 78-83% (Longland et al., 2012), making them safe and effective grazing moderation tools. You can also feed hay, of course, but recognize it contains NSCs that you might need to soak away before feeding.

Prioritize prevention, and don’t wait for the arrival of spring grass to take the steps necessary to keep your horse safe. Starting in late winter, Cohen recommends asking your veterinarian to pull blood and check on your horse’s metabolic status. The goal is to determine if you need to adjust medication, diet, and/or management tactics.

On the topic of nutrition, spring is a good time to consider whether your horse’s diet is still meeting his needs. If his workload has fluctuated over the past few months and/or if his weight or energy levels have changed, take a fresh look at what goes in his feed bucket. “Steady increase in proper caloric intake may be necessary as your horse begins to work in higher intensity during the spring,” Gorman says. Your veterinarian or nutritionist can advise you when reevaluating feeding plans for horses in your barn.

Hair coat and body clipping
With both ambient temperatures and riding time on the rise during spring, we sometimes find ourselves sliding off sweat-soaked mounts that take hours to dry. Shaving away that bothersome winter coat is an appealing solution, albeit a controversial one.

Many factors will affect whether body clipping is the best thing for you and your horse,” Gorman says. “Location and weather—especially humidity—breed of horse, discipline, and level of work are all important elements to consider.”

If a horse is in an intense training program, she says she has no qualms about body clipping if the owner is aware of the precautions they must take during inclement weather. “I would not, however, body clip past February or March because that could affect your horse’s summer coat that is coming in as he sheds,” Gorman says. “That’s of course excluding horses with PPID, for which clipping year-round may be necessary to maintain comfort.”

The main point is the choice to body clip will depend on individual circumstances affecting you and your horse.

Bringing Your Horse Back Into Work
With bitter weather and limited daylight during winter, many of us opt to take a break from riding. If you’re one of those riders, you certainly know bringing horses back into work from a period of rest requires preparation and patience.

Gorman walks us through her protocol: “If an equine athlete is starting back from several months off, I do recommend having your veterinarian perform a basic flexion exam. Ensuring that tendons, ligaments, and joints haven’t sustained any damage before starting work again will set you up for a successful comeback.”

She and other experts agree that taking things slowly when working back up to previous athletic ability is a must. “Walk and trot large circles,” she says. “Ride up hills. Do five to 10 minutes of supple walking and bending between trot intervals. Ride in shorter trot/canter intervals for the first few weeks as your horse is regaining both cardiovascular and musculoskeletal fitness. And don’t forget to give him breaks. Recovery is just as important for muscle conditioning as is the actual work.”

As fitness increases, so does muscle mass. Bulkier muscles could translate to altered saddle fit, so reach out to a professional saddle fitter if your horse shows signs of discomfort through his back as you return him to fitness.

Final Step: Spring Cleaning
Now that you’ve checked all the horse care items off your list, it’s time to prepare your horse’s living environment for the new season ahead. The past two years spent navigating life through a pandemic have taught us more than most care to know about sanitation and biosecurity.

As warmer weather rolls around, take the time to perform a deep spring cleaning of your barn and equipment. Run blankets through the washer, soak your grooming brushes in disinfectant, and scrub that muck off the stall walls. Whether we’re talking about thrush or EHV, good hygiene is a key part of disease prevention.

Take-Home Message
Your horse has individual needs. To keep him protected and healthy, you must provide him with the right care at the appropriate times. Full of changes and challenges, spring is an important season to stick to the preventive health care plan devised with your veterinarian. By being diligent about vaccinations, deworming, diet, and other routine necessities, you can do your part to ensure your horse has a long and productive life.

The Horse

Preparing the Mare for Breeding SeasonMares not prepared well ahead of the equine breeding season often take longer to c...
03/20/2026

Preparing the Mare for Breeding Season

Mares not prepared well ahead of the equine breeding season often take longer to cycle, need to be bred more times to conceive, and might have lower overall fertility. During a presentation at the 2025 American Association of Equine Practitioners Convention, held Dec. 6-10, in Denver, Colorado, Etta Bradecamp, DVM, Dipl. ACT, ABVP, of Rood & Riddle Equine Hospital, in Lexington, Kentucky, explained how veterinarians and horse owners can work together to prepare mares for breeding season.

Breeding Soundness Exams for Mares
A key starting point is the breeding soundness examination, said Bradecamp. For barren mares, ideally veterinarians should perform this evaluation in the fall, not at the beginning of breeding season. Ultrasound, uterine culture and cytology, and assessment of the cervix and perineal (region between the a**s and v***a) conformation can identify lingering issues such as chronic endometritis, urine pooling, or compromised reproductive barriers. Addressing these problems months in advance can make the breeding season easier for both the mare and veterinarian.

Lighting for Breeding Management
Artificial lighting remains a critical management tool, especially for breeders aiming to have foals born early in the season. Most mares in the Northern Hemisphere have their first ovulation of the year in early April. To advance that timeline, mares need 60 to 70 days of extended light exposure beginning around Dec. 1, said Bradecamp. Owners can accomplish this using traditional barn lighting programs or light masks, which allow mares to stay outdoors while still receiving an effective photoperiod. However, light exposure works best when mares also have adequate nutrition and protection from extreme cold, she added.

Nutrition and Body Condition for Broodmares
Nutrition and body condition play a central role in reproductive efficiency. Researchers have shown that mares entering the breeding season thin—with a body condition score below 5—are slower to cycle and less likely to conceive easily. “In some studies, breeding efficiency was enhanced in mares entering the breeding season or foaling at a body condition score of 5 or above,” said Bradecamp. Winter management deserves particular attention because mares expend more energy to maintain body temperature and might lose condition without thoughtful feeding strategies.

Chronic Health Conditions in Broodmares
Prior to the start of breeding season, veterinarians should investigate chronic health issues in broodmares. Equine metabolic syndrome (EMS) and pituitary pars intermedia dysfunction (PPID, formerly equine Cushing’s disease) can interfere with normal ovarian activity, and both conditions often require months of dietary and medical management before seeing improvements. “(Veterinarians) need to correct these metabolic problems early so that once breeding season arrives, the mare is well controlled,” said Bradecamp. Diet and exercise changes often help control these conditions, but horses might also benefit from medical management—especially those with PPID.

Chronic pain and lameness might also affect reproductive performance, said Bradecamp. She noted that researchers on multiple studies in cattle showed lameness negatively affected fertility. “Additionally, it is important to understand the effects that medications used to treat pain might have on the reproductive cycle,” she said.

A mare’s cortisol levels could also affect her fertility. “The mare that has gone from being stalled and blanketed might not do well being turned out year-round and fighting for her meals in a group,” said Bradecamp. “Having these mares with the least amount of stress possible in their lives is important.” Some non-steroidal anti-inflammatory drugs can affect uterine clearance, and flunixin meglumine (Banamine) has been associated with an increased incidence of hemorrhagic anovulatory follicles when administered near ovulation.

Take-Home Message
Equine breeding success reflects long-term management rather than last-minute intervention. Addressing reproductive soundness, nutrition, lighting, and systemic health well before the breeding season begins gives mares the best chance to cycle normally and conceive efficiently. “One must be productive before they can be reproductive,” said Bradecamp.

The Horse

How Do You Know if a Horse is Lame?Some types of lameness are obvious. The horse that is pointing a hoof and barely load...
03/16/2026

How Do You Know if a Horse is Lame?

Some types of lameness are obvious. The horse that is pointing a hoof and barely loading the limb (or displaying a large head lift when the affected limb is loaded) needs help. Subtle lamenesses, however, are more difficult to recognize, and early detection and intervention are often key to successful resolution.

Lameness is a symptom that something within the limb or body hurts enough that the horse alters its gait to control the amount of load the affected limb has to bear. This alteration in load usually creates an asymmetry to the gait. Front limb lamenesses are more common, because the horse carries 60 percent of its body weight on the forelimbs. Horses use their heavy head and neck to control the amount of weight delivered to each front limb. Head motion and position can be helpful when evaluating front limb lameness with the old adage, “down on sound.” Hind limb lamenesses can be more difficult to detect, and movement of the pelvis will help to indicate asymmetrical load behind.

There are three phases to loading of the equine limb, and certain types of lamenesses will be most obvious during one of these phases:

Impact: The amount of force at impact with the surface is dependent upon the horse’s speed and weight, as well as the firmness of the surface. As the hoof meets the surface, it must slow down and engage the surface in order to push off. This natural deceleration of the foot must combat the forward motion of the horse. If the deceleration is too rapid, as can occur with certain types of footing, then the musculoskeletal system of the horse is more likely to be strained. Most front end lamenesses are impact lamenesses, and the horse will use its head to control the load. When the impact lameness is behind, the horse will often display an asymmetry in pelvic lift. An ideal surface will cushion impact, allow for grip, and then transfer some energy back to the horse.

Push off: This occurs when the horse’s hoof grabs the ground surface and propels against it, creating forward motion. Push off engages different muscles and support structures than impact, and many hind limb lamenesses are associated with push off. These horses will often drop their pelvis due to lack of impulsion.

Swing: The swing phase of the stride occurs while the horse’s limb is in flight, after push off and before impact. There is no load on the leg during this phase, however, muscles, tendons and ligaments are necessary to create the flexion and extension that are necessary to create the swing. Swing phase lamenesses are less common, but do occur.

What should riders look for?
Sometimes the gait asymmetry is only present with the rider on board, or performing a certain task; this makes evaluation under tack an important part of a lameness exam. Riders can help veterinarians by sharing nuances noticed while riding. Subtle lameness can manifest as a simple aversion or difficulty in performing a certain movement, or traveling in a certain direction. Examples of this can be reluctance to canter or lope, failure to hold lead or preference for striking off on one limb, ear pinning, tail swishing, or kicking out in certain movements. Jumping horses may consistently add a stride or jump to the side of a fence. Saddle slip has recently been associated with hind limb lameness, with the saddle often slipping to the lame side. In the majority of cases, lameness is most obvious in the trot or jog. If a gait asymmetry is detected, but the involved limb is not obvious, it is most likely the limb on which the horse spends the least amount of time. The “Law of Sides” suggests that if diagonal shortness is apparent, the primary problem is most likely coming from the front end. If there is trouble determining front or hind on the same side, the problem is most likely coming from the hind end. Involving a veterinarian with experience in lameness detection early on is wise and can prevent more serious injury from occurring with continued use.

What will the veterinarian do to diagnose lameness?

The key to successful resolution of lameness is an accurate diagnosis of why the horse is limping. Veterinarians are trained to palpate the anatomical structures of the horse and to evaluate joint range of motion and soft tissue sensitivity. They will observe the horse in hand and under saddle and note the most obvious lameness, followed by suspected compensatory lameness and secondary lameness.

Flexion tests can help to localize lameness and are often part of a routine lameness examination. Flexion tests are less accurate localizing a hind end lameness. It is difficult to isolate the hock from the stifle from the hip, as they are connected by the stay apparatus and flex together. Certain manipulations can increase the specificity of these tests. Hoof testers are used to assess sensitivity of the foot. 80 percent of forelimb lameness is caused by foot pain.

Nerve blocks involve the administration of a local anesthetic to peripheral nerves and/or joints to systematically desensitize areas and look for improvement in gait. Because a horse cannot tell us where the pain is coming from, we rely on nerve blocks to identify the area to be imaged. Certain areas of the body are difficult to block due to access or safety. Some practitioners will augment the traditional lameness exam with other tools such as a chiropractic exam, an acupuncture scan, and/or the use of inertial sensing devices such as the Lameness Locator. Recent research demonstrated that 80 percent of horses with an abnormal acupuncture scan were lame.

How to keep a horse sound and comfortable?
• Horse owners should palpate their horse’s limbs and joints daily, and get to know the feel of their horse. Subtle temperature changes or swelling should be monitored and discussed with a veterinarian.
• Maintain a regular shoeing interval to minimize abnormal force or torque on the limb.
• Work the horse on a variety of footings to create resilience in its musculoskeletal system. Talk to a veterinarian about the horse’s footing.
• Only school a horse at the level of competition once or twice weekly. Train to a task and be done when it is successfully completed. Once a horse is fit, it remains fit with much less exercise than most realize, and repetitive use injury is likely to sideline a horse.
• Provide a balanced, nutritional diet and maintain an ideal athletic body condition score of 5 which minimizes stress on the joints and skeletal system.
• If competing, ask a veterinarian to evaluate the horse’s soundness at least twice yearly, to ensure that issues don’t arise under the radar.

UC Davis school of veterinary medicine

Let’s talk about spring vaccines!We recommend and offer a couple fairly important core vaccines for the Spring time, Spr...
03/09/2026

Let’s talk about spring vaccines!

We recommend and offer a couple fairly important core vaccines for the Spring time, Spring is the best time to vaccinate your horses for the big carried diseases to help protect them if bit by an effected bug! It is also highly recommended to vaccinate your horses if you travel with them to any other location, as you never know the status of others in the same place.

Our core Spring vaccines include:

VETERA® GOLDXP
Vetera Gold is the 5 way combo vaccine we use primarily in our spring vaccine regimen, along with Rabies.

* VETERA® GOLDXP has been shown to be effective for the vaccination of healthy horses 4 months of age or older, including pregnant mares, against:
* Eastern and western encephalomyelitis (EEE & WEE)
* West Nile virus (WNV)
* Teta**s
* Respiratory disease due to equine herpesvirus types 1 and 4 (EHV-1 & EHV-4)
* Equine influenza virus (EIV)
* VETERA® GOLDXP has also been shown to be effective against viral shedding due to A2 EIV and against viremia, mortality, and neurological clinical disease due to WNV
* The VETERA® portfolio features a wide range of progressive choices and contains the most comprehensive 1 mL vaccine (VETERA® GOLDXP + VEE) on the US market
* VETERA® was the first vaccine in the US updated to contain both Florida sublineage clade 1 and clade 2 EIV, as recommended by the World Organisation for Animal Health (WOAH) on Equine Influenza and AAEP

Boehringer Ingelheim

IMRAB Large Animal Rabies Vaccine

Overview
Killed virus recommended for the vaccination of healthy cattle, horses and sheep 12 weeks of age or older against Rabies viruses.

Rabies is so important, because you never know when a wild animal is infected. One bite and the disease is passed to your horse and can be passed so easily to you. The Rabies Vaccine is such a safe vaccine to give and such an easy way to prevent this violent disease from being passed along to anyone.

Vaccinating your horse is highly recommended and the easiest way to help lessen the out break of these diseases. You are always more than welcome to text our clinic number at 417-448-0131 with any questions you may have about the vaccines and of course to schedule your Spring vaccine appointment with us!

Boehringer Ingelheim

Let’s clean some ponies!!🌸 Spring is coming! Which also means it is muddy! 🌸🧼 So here is a friendly reminder to those ma...
03/05/2026

Let’s clean some ponies!!

🌸 Spring is coming! Which also means it is muddy! 🌸

🧼 So here is a friendly reminder to those making their spring injection/lameness appointments.

🧽 Let’s help Regan’s back!

🫧 First, if you have an appointment that has the possibility to turn into joint injections please rinse your horse before hand. Rinse their whole bodies, including all limbs!

🫧 this can A, reduce the chance of possible joint infection or cellulitis! Between your rinsing and our scrubbing the chance goes way down!

🫧 and B, helps our appointments go smoothly and on time so you don’t have to spend all day with us! (Even if we are pretty cool 😏)

🫧 and C, you cleaning off your equine prior to your appointment eliminates our need to add $25 onto your bill for all the extra scrubbing we have to do 😔

🐴🐴Breeding season is here🐴🐴Breeding services offered by our practice:🏊‍♂️artificial insemination with fresh, cooled, or ...
03/03/2026

🐴🐴Breeding season is here🐴🐴

Breeding services offered by our practice:

🏊‍♂️artificial insemination with fresh, cooled, or frozen semen
💉mare management to prep for successful breeding- including cultures, antibiotic therapy, and uterine lavages
🥚embryo collection and transfer

We do not offer:
🍆stallion services
🧑‍🍼foaling out services

Now is a great time to culture your mares and prep for a successful breeding season!

Please contact the office via text at 417-448-0131 to schedule an appointment today!

How to Predict FoalingYour mare was bred on June 1 of last year. Equine gestation is about 340 days (roughly 11 months),...
03/02/2026

How to Predict Foaling

Your mare was bred on June 1 of last year. Equine gestation is about 340 days (roughly 11 months), so her expected due date is coming up in a few months, around May 6. That 340-day figure is just an average, however, meaning it’s perfectly normal for a mare to foal as many as three weeks earlier or later than expected.

You’d like to be present at the birth in case there’s a problem, but that’s quite a window and you’ve got a lot going on this spring. Hovering over the expectant dam in the barn 24/7 is impractical and, quite frankly, could make her nervous and delay the process. Like many breeders, you’d like to be able to predict when exactly she might foal.

Good news: There are signs and tools to help. Here two reproduction-focused vets offer their expertise and suggest ways to take away some of the mystery, so you can be there for the big event.

Physical Changes
In late gestation (from Day 250 onward) mares experience several observable physical changes. Ahmed Tibary, DVM, PhD, Dipl. ACT, professor emeritus of theriogenology in Washington State University’s Department of Veterinary Clinical Sciences, in Pullman, advises breeders to examine the mare periodically to monitor how her body is changing to be ready for parturition (birth).

“Mares are quite variable in their signs of preparation for foaling, depending on whether they are older broodmares that have had several foals or maiden mares,” he says. “Premonitory signs based primarily on morphological (structural) changes can be quite subtle in some mares, difficult to discern, and are not precise. They tell you that the mare is getting ready, but they don’t narrow down the time of foaling to an actual day.”

There are, however, things you can monitor to make sure the mare is progressing normally in preparation for foaling.

“The classic physical change is mammary development, or a significant increase in udder size,” says Robyn Ellerbrock, DVM, PhD, Dipl. ACT, assistant professor at the University of Georgia’s College of Veterinary Medicine, in Athens. This can begin two to three weeks before foaling—further out than this can signal problems such as placentitis (inflammation of the placenta). As the mare gets closer to parturition (usually in the last two to three days of pregnancy) she’ll begin accumulating dried secretions on the tips of her teats, a process known as waxing.

“It is important to realize that we are talking about probability, rather than a definite time frame, when we see a mare waxing,” says Tibary. “About 90% of mares will foal within 24 to 48 hours, but some mares wax longer. A mare might wax very briefly or for several days. Last year we had a mare at the hospital that waxed for about a week. That might be due to being in the hospital where there is a lot more going on; if the mare doesn’t find a quiet time she may delay foaling.”

Other signs include relaxation and elongation of the v***a, as well as softening of the pelvic ligaments around the tailhead. “Sometimes you can also see an actual change in the shape of her abdomen as the foal is repositioning and preparing to enter the birth canal,” Ellerbrock says.

“All of these are good indications that the mare is progressing normally in pregnancy, as long as she seems fine and remains healthy,” says Tibary. “For the purpose of making sure someone is there in case there is trouble, however—particularly for maiden mares or mares that have had problems in the past—we need something more precise. Most of the research over the past 40 years has been focused on finding more precise ways of predicting when the mare will foal.”

Check on late-gestation mares several times daily (at feeding time, for instance). As physical signs of parturition progress, you can institute round-the-clock monitoring using cameras and other devices we’ll describe in a moment.

Behavioral Changes
If you know your mare’s normal behavior and habits, you can pick up on the subtler changes that indicate impending labor. Mares usually begin showing behavioral signs of early labor (Stage 1) one to four hours before going into active labor (Stage 2), although some mares show signs of early labor for more than a day. These include:

* Acting restless and alert;
* Lying down or getting up and down more frequently than normal;
* Pawing, tail-swishing;
* Lifting the tail and turning around to look at or bite the flanks;
* Pacing around the pen or stall;
* Sweating;
* Curling the upper lip in the flehmenposition;
* Making unusual mouth movements and yawning;
* Urinating and defecating small amounts frequently;
* Going off feed or eating less than normal; and
* Dripping or streaming milk.

For some owners it can be challenging to differentiate between signs of early labor and signs of colic, because both cause discomfort. Most mares show subtle colicky signs during first-stage labor when experiencing initial uterine contractions and repositioning of the fetus. Many mares circle or look like they are preparing to lie down. “As more contractions occur, they usually start sweating— particularly on the neck, shoulders, and flanks,” Tibary says.

For this reason it’s important to monitor the mare’s water intake and manure production. If both are normal she’s probably foaling, not colicking, says Ellerbrock.

Tibary says the best-qualified person to observe the mare is someone who knows her and how she behaves daily in the stall or pasture. “That person can pick up on subtle behavioral changes, when she is acting a little different—more alert or worried,” he says. “Mares have a typical routine through the day. If a mare starts behaving a bit different from her normal routine, this is a sign that something is changing.”

Indeed, the mare feels internal changes and becomes more preoccupied with these sensations than her regular routine.

“A lot depends on whether you are observing a mare on pasture, out with other horses, or in a stall,” Tibary says. “Each case is different. Perhaps she is too quiet today or spending more time with her head down and is just not herself. Then the signs progress to more increased alertness, circling, etc.”

If the mare is with other horses, she might go off by herself or stay behind the group. If she is confined she might become frustrated and start pacing her pen or stall.

“We tell mare owners to be looking for any of these subtle signs during pregnancy and not just before she is supposed to foal, because those are also signs you might see if she’s about to lose the fetus or foal prematurely,” Tibary says.

He points out that these behavioral signs are quite variable from one mare to another. “We’ve seen mares that just continue to do what they’ve been doing; they munch on hay and go on about business as usual and then suddenly go into second-stage labor,” he says. Others might appear to have mild discomfort for several days before labor begins.

Picking up on these signs becomes more difficult at a veterinary clinic, where the observer isn’t familiar with the mare. “We don’t know her normal routine,” says Tibary. “We changed it, and she may be more nervous anyway or may not want to show any signs. This is when the biochemical tests (more on these in a minute), particularly the strip tests for calcium and pH, become very helpful for monitoring.”

Monitoring Devices

A number of signaling devices (e.g., Foal-Alert, Birth Alert, Foal Alarm, etc.) are available to notify the owner, farm manager, or foaling attendant that a mare is or could be in labor. Some attach to the mare’s halter, while others are stitched to her v***a. When she lies flat or her v***a lips begin to spread apart, respectively, each device transmits a signal to a receiver that sounds an alarm or calls your phone.

“These devices can be helpful, but can’t fully replace visual observation,” says Tibary. “Most electronic techniques are triggered by the second stage of labor, and in some instances these alarms might be a little too late, since mares foal so quickly. The mare could foal before you are able to get to the barn.”

Also, in the case of a dystocia (difficult birth), the sensor sutured to the v***a might not work because the foal can’t reach the v***a to trigger an alert, says Ellerbrock.

“There is also a company working on devices on the halter that monitor the mare’s heart rate as well as when she is getting up and down—looking at the horse’s vital parameters,” says Ellerbrock. “This would signal that the mare is either foaling or colicking.”

Other monitoring methods include closed-circuit TV or we**am, which allow you to watch the mare from your house or smartphone. You can observe signs of early labor before the other types of monitoring kick in.

“Here at our hospital we constantly watch (on we**am) all the mares being monitored for foaling, particularly those that have had a difficult pregnancy,” says Tibary, adding that this allows you to watch the mare from a distance, without disturbing her.

Ellerbrock describes the convenience of apps that connect to the we**ams: “You could be out for dinner and pull up the mare on your phone to watch what she is doing,” as long as the barn has Wi-Fi access.

“Night-vision cameras are the best option because you don’t have to leave a light on in the barn all night, which could interfere with the mare’s natural circadian rhythm and when she decides to foal,” she adds.

Mammary Secretion Tests
Owners and veterinarians can use a variety of biochemical tests to determine when a mare is near foaling. The traditional one is based on electrolyte changes in mammary secretions.

“To do a full monitoring (which must be done at a lab) we can look at calcium, sodium, and potassium levels,” says Tibary. “The real trigger in knowing when the mare is going to foal is when we see the level of sodium and level of potassium invert. At first the sodium would be very high, then as the mare gets close to foaling the sodium will be lower than potassium. That point of inversion … tells us the mare is within about 24 hours of foaling.”

At this point you can intensify your visual monitoring.

Testing the calcium levels in a mare's mammary gland secretions can give you a good idea of when she will foal. In this test, if all five squares change to red, then she has a high liklihood of foaling within the next 12-24 hours. | Photo: Courtesy Dr. Ahmed Tibary

“Other tests focus primarily on calcium, which is also a good indicator of imminent foaling,” he says. “Calcium in mammary secretions progressively increases in concentration as the mare gets closer to foaling. There are many types of test strips (e.g., Predict-A-Foal, FoalWatch) that are commercially available.”

When these tests show the secretions’ calcium content reaches 200 parts per million, the mare has about a 50% chance of going into labor within 24 hours; about an 85% chance within 48 hours; and about a 95% chance within 72 hours.

“Another method we are starting to use in combination with the calcium strip test looks at pH of the secretions,” says Tibary, which decrease progressively leading up to foaling. “Research over the last five years has shown that pH of mammary gland secretions is highly correlated with electrolyte changes. When the pH reaches 6.5 or lower, there’s high likelihood the mare will foal within the next 24 hours. These two tests combined add a little more precision for the mare owner or for the veterinary clinic. However, not all mares drop their pH in the same way.”

For instance, maiden mares’ milk pH levels tend to decrease very rapidly in the 24 hours before foaling, while those of older mares that have had foals previously tend to decrease more slowly (you can find these pH ranges in Ellerbrock’s research at TheHorse.com/39054).

“When using pH strip tests, it is important to use commercial strips providing readings in 0.1- or 0.2-unit increments,” she says. “Test strips measuring pH in 0.5-unit increments won’t be useful for identifying subtle changes that predict imminent foaling.”

Despite these tests, not all mares go by the book. “We’ve had mares that remained very high in calcium … for up to five days before foaling,” says Tibary, noting that a likely reason was that their routines had changed; mares can delay labor for 24 hours or more. For that reason, these tests are probably more predictable at home, in the mare’s familiar environment, he says.

Other things that affect these tests include high-risk pregnancies and abnormal mammary gland development. Some maiden mares or mares that have leaked milk prior to foaling might also throw off test results.

“Mares that have been treated for placentitis or mares that have undergone surgery for colic during pregnancy or have had other stresses or disturbances of the normal hormonal changes will not have a reliable test,” says Tibary. “Then we must fall back on watching them closely and using electronic devices.”

While monitoring calcium, electrolytes, and milk pH levels in healthy mares is typically a more accurate predictor of foaling than evaluating physical changes alone, it does add an expense.

Calcium tests and full panel electrolytes are going to cost more than ommercially available pH strip tests, adds Ellerbrock.

Take-Home Message
Gestation length varies so widely in mares that it pays to monitor them closely in late gestation, to watch for the changes that signal readiness for foaling. Careful observation, monitoring devices, and milk test kits are all useful tools for helping predict impending parturition.

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