Colic in Horses

Colic isn't a disease - it's a symptom of abdominal pain. When horse people say a horse is colicking, they mean the horse is showing signs of discomfort in the digestive tract. The pain could be from gas, an impaction, twisted intestine, ulcers, or a dozen other causes. Colic is the number one medical cause of death in horses, which is why every horse owner needs to understand the basics.

Most colic episodes are mild and resolve with minimal intervention. Your horse looks uncomfortable for a while, you walk them, maybe the vet gives some pain medication and fluids, and within a few hours they're fine. These mild cases are common and usually not life-threatening, though they're still stressful for everyone involved.

Severe colic is a different story. When you've got a twisted intestine or a complete blockage, that horse can go from uncomfortable to critical in a matter of hours. These cases require immediate veterinary attention and often emergency surgery. The difference between a horse that makes it and one that doesn't often comes down to how quickly the owner recognized the problem and got help.

Every horse owner will deal with colic at some point. It's not if, it's when. Knowing what to look for, when to call the vet, and how to handle the situation until help arrives is essential knowledge. Panic doesn't help your horse - calm, informed action does.

This article walks through what causes colic, how to recognize the signs, when to call for help, and what treatments look like. Understanding colic doesn't make it less scary, but it does help you respond effectively when your horse needs you most.

Colic has dozens of possible causes, but they all boil down to something interfering with normal digestive function. Impactions are probably the most common - the intestine gets blocked with dry feed material, sand, or even a foreign object, and things back up. Horses that don't drink enough water are particularly prone to impaction colic, especially in cold weather when water consumption drops.

Gas colic happens when fermentation in the gut produces excessive gas that can't move through normally. The intestine distends with gas, causing pain. Sometimes it resolves on its own as the gas passes, other times it requires intervention. Sudden diet changes are a classic trigger for gas colic because they disrupt the normal bacterial balance in the gut.

Displacement and torsion are more serious. The horse's intestine can shift out of its normal position or even twist on itself, cutting off blood flow. Large colon displacement can sometimes be corrected by rolling the horse under anesthesia, but a twisted intestine usually means emergency surgery. These are true emergencies.

Ulcers cause colic pain, particularly in performance horses and young horses in training. The stomach lining gets irritated and damaged, causing chronic low-grade discomfort or acute pain during or after eating. Stress, intense work, and NSAID use all contribute to ulcer development.

Parasites can cause colic, though modern deworming practices have made this less common than it used to be. Heavy parasite loads can cause impactions or intestinal damage. Horses with poor deworming history or those grazing on crowded pastures face higher parasite risk.

Certain horses seem more colic-prone than others. Some of this is management - horses that change hay batches frequently, don't have consistent access to clean water, or experience lots of stress and routine changes have higher colic rates. But some horses just seem to have sensitive guts regardless of how well you manage them.

The classic colic sign is a horse that keeps looking at or biting at their flank. They turn their head to their side repeatedly, clearly indicating that something back there hurts. It's one of the first things you notice when you walk into the stall.

Pawing is another common sign. The horse digs at the ground with a front foot, sometimes frantically. This isn't the casual pawing of an impatient horse waiting for dinner - this is persistent, focused pawing that comes from discomfort. Combined with other signs, pawing is a red flag.

Many colicking horses will try to lie down and roll. Some mild colic resolves with rolling as the horse shifts gas or repositions their intestines, but violent, repeated rolling attempts are concerning. If your horse is throwing themselves down and thrashing, that's a severe pain response that needs immediate attention.

Changes in manure are significant. No manure when the horse should be producing it regularly, very small amounts, diarrhea, or manure that looks abnormal in color or consistency all point to digestive trouble. If your horse hasn't passed manure in several hours and seems uncomfortable, that's cause for concern.

Vital signs change with colic. Heart rate climbs above the normal 28-40 beats per minute - moderate colic might show 50-60, severe colic can push it over 80. Gum color matters too - normal pink gums that become dark red, purple, or pale white indicate circulatory problems from severe pain or shock.

Some horses get very quiet when they're in pain rather than active. They stand stretched out like they're trying to pee but don't actually urinate. They're still, staring at nothing, with a glazed expression. Don't assume a quiet horse is fine - sometimes quiet means they're shutting down from pain.

When your vet arrives for a colic call, they'll start by checking vital signs - heart rate, respiratory rate, temperature, and gum color. These numbers tell them how much pain the horse is in and whether they're going into shock. A mildly elevated heart rate might mean mild discomfort, while a racing heart suggests serious trouble.

The vet will listen to gut sounds with a stethoscope in all four quadrants of the abdomen. Normal gut sounds are like steady, productive gurgling - lots of movement and activity. Absent gut sounds or tinkling, high-pitched sounds are concerning. Gut sounds help determine whether things are moving normally or if there's a blockage or displacement.

Rectal examination is standard for colic evaluation. The vet puts on a long glove and feels inside the rectum to check for impactions, displacements, distended intestine, or abnormal masses. It's not pleasant for the horse, but it provides critical information about what's happening internally. Many diagnoses can be made or ruled out based on rectal findings.

Nasogastric intubation - passing a tube through the horse's nose into their stomach - serves two purposes. First, it allows the vet to check for fluid backing up in the stomach, which indicates an obstruction further down. Second, it lets them administer fluids, medications, or mineral oil directly into the digestive tract. If several gallons of fluid reflux back out, that's a bad sign pointing toward a blockage.

For mild to moderate colic, treatment often involves pain medication like Banamine or other NSAIDs, plus fluids and possibly mineral oil to help move an impaction along. The vet might recommend hand-walking to stimulate gut motility. Many horses respond well to this conservative approach and are fine within hours.

If the horse doesn't improve with initial treatment, or if findings suggest a surgical problem, referral to a hospital becomes necessary. Imaging studies like ultrasound or even exploratory surgery might be needed to determine exactly what's wrong. Some colic cases can only be diagnosed definitively by opening the abdomen and looking.

Surgery for colic varies in complexity. Some procedures are straightforward - removing an impaction or repositioning displaced intestine. Others are extensive, involving resection of dead bowel and lengthy recovery periods. Surgical colic is expensive, risky, and demands intensive aftercare, but it's often the only chance for survival with certain types of colic.

While you're waiting for the vet, keep your horse on their feet if they're trying to roll violently. Thrashing can cause additional injury or worsen a displacement. Hand-walk them slowly to keep them moving and distracted from the pain. Don't exhaust them, just keep them calm and upright.

Remove all food and water until the vet says otherwise. Offering feed to a horse with a potential blockage won't help and could make things worse. The vet needs to pass a tube and check for reflux anyway, and an empty stomach makes that process easier and safer.

Monitor vital signs if you know how. Take the heart rate by feeling the pulse behind the jaw or listening with a stethoscope at the left elbow. Check gum color by lifting the lip and looking at the tissue above the teeth. If you can track these numbers before the vet arrives, it helps establish a baseline.

After treatment for mild colic, reintroduce feed slowly. Start with wet feed or grass hay, small amounts frequently. Don't dump a full ration in front of a horse that just colicked - their gut needs time to get back to normal function. Your vet will give you specific instructions based on what they found and treated.

For horses recovering from colic surgery, follow your veterinarian's rehab protocol exactly. These horses typically need months of restricted activity, careful feeding management, and regular monitoring before returning to full work. Don't rush the process. Colic surgery is major abdominal surgery with significant healing requirements.

Prevention is always better than treatment. Provide constant access to clean, fresh water - heated in winter if necessary. Make feed changes gradually over 7-10 days minimum. Maintain a consistent routine as much as possible. Regular dental care, appropriate deworming, and daily exercise all contribute to digestive health and reduce colic risk.

The best colic prevention is good basic horsekeeping. Clean water, quality forage, gradual diet changes, regular exercise, and consistent routine - these aren't complicated or expensive, but they dramatically reduce colic risk. Most colic is preventable with proper management.

Water is critical. Horses that don't drink enough are at much higher impaction risk. In winter, offer warm water or use heated buckets to encourage drinking. Monitor water consumption, especially during weather changes. A horse that suddenly stops drinking is at elevated colic risk.

Feed management matters. Avoid sudden changes in hay type or quantity. Don't switch feeds without a transition period. Feed consistent amounts at consistent times. Horses are creatures of habit, and their digestive systems function best with predictable routines. Disruption stresses the gut.

Regular turnout and exercise keep things moving internally. Pasture time is ideal - horses graze, move around naturally, and stay hydrated. Even 20-30 minutes of daily walking or riding helps maintain normal gut motility. Horses stuck in stalls without activity have higher colic rates.

For horses with a colic history, extra vigilance is warranted. Keep detailed feeding and manure records. Know your horse's normal behavior so you catch changes early. Some chronically colic-prone horses benefit from daily probiotics, psyllium supplementation if they eat sand, or ulcer management protocols.

The prognosis for simple colic is generally good. Most horses recover completely with minimal treatment and never colic again - or at least not for years. Surgical colic has a more guarded prognosis depending on what was wrong and how much intestine had to be removed, but many surgical colic cases make full recoveries and return to their previous work.

The key is recognizing colic early and getting help quickly. Waiting too long or hoping it will resolve on its own can turn a treatable problem into a fatal one. When in doubt, call your vet. Better to have them tell you it's nothing serious than to wait until it's too late.