The Word Every Horse Owner Dreads
Colic. Just hearing the word is enough to make experienced horse people's stomachs tighten. It's the number one killer of horses outside of old age, and almost every horse owner will deal with at least one colic episode at some point. Some are mild and resolve with a quick intervention. Others escalate into life-threatening emergencies that require surgery or end with impossible decisions. Understanding colic - what it is, what causes it, how to spot it, and what to do about it - is essential knowledge for anyone who owns or cares for horses.
Colic isn't actually a single disease. It's a catch-all term for abdominal pain, which can have dozens of different causes ranging from a mild gas bubble to a twisted intestine. The horse's digestive system is remarkably long - roughly 100 feet of intestine - and it's designed for continuous grazing on fibrous plant material. When something disrupts that system, whether it's a change in feed, a blockage, or a displacement, the result is pain. And horses communicate pain in ways that can range from subtle to dramatic.
Types of Colic
Not all colic is the same, and understanding the different types helps you grasp why treatment varies so much from case to case.
Gas Colic (Spasmodic Colic)
This is the most common type and, thankfully, usually the least serious. Gas builds up in the intestines, causing cramping and discomfort. It often resolves on its own or with basic veterinary treatment like analgesics and anti-spasmodic medications. Most horses with gas colic are uncomfortable but not in extreme distress.
Impaction Colic
An impaction happens when a mass of feed material, sand, or other debris gets stuck in the intestine - most commonly at the pelvic flexure of the large colon, which is a natural bottleneck. Dehydration, poor dental health, and inadequate water intake are major contributing factors. Mild impactions can often be resolved with fluids administered through a nasogastric tube and pain management. Severe impactions may require surgery.
Displacement and Torsion
This is where things get serious fast. A displacement occurs when a section of intestine shifts out of its normal position. A torsion (twist) cuts off blood supply to the affected segment. Torsions are surgical emergencies - without quick intervention, the tissue dies and the horse dies with it. These cases typically present with severe, unrelenting pain.
Enteritis and Colitis
Inflammation of the small intestine (enteritis) or large intestine (colitis) causes pain, often accompanied by diarrhea and fever. These can be caused by bacterial infections like Salmonella or Clostridium, or by other inflammatory processes. They're serious because they can lead to dehydration, endotoxemia, and laminitis as secondary complications.
Sand Colic
Horses that graze on sandy soil or eat hay off sandy ground gradually ingest sand that accumulates in the large colon. Over time, this sand irritates the intestinal lining, causes diarrhea, and can create impactions. It's particularly common in the Southwest, Florida, and other sandy regions.
Recognizing the Signs
Here's what makes colic tricky - horses can't tell you where it hurts or how bad it is. You have to read their behavior and body language. Some signs are obvious, while others are easy to miss if you're not paying attention.
Early and Mild Signs
- Decreased appetite or refusing feed entirely
- Standing quietly with a slightly depressed appearance
- Turning the head to look at or nip at the flanks
- Mild pawing at the ground
- Stretching out as if trying to urinate but not producing urine
- Fewer or no gut sounds when you listen at the flanks
- Reduced or absent manure production
Moderate to Severe Signs
- Repeated lying down and getting back up
- Rolling - sometimes violently
- Kicking at the belly
- Sweating without physical exertion
- Elevated heart rate (normal is 28-40 beats per minute; colic horses often run 50-80 or higher)
- Rapid or shallow breathing
- Curling the upper lip
- Distended (bloated) abdomen
- Dark or congested gum color (should be pale pink, not dark red, purple, or muddy)
Emergency Signs
- Violent, uncontrollable rolling and thrashing
- Heart rate above 80 bpm that doesn't respond to pain medication
- Gums that are purple, gray, or dry
- Capillary refill time over 3 seconds (press the gum, color should return within 2 seconds)
- No gut sounds at all in any quadrant
- Complete absence of manure for 12 or more hours
What to Do When You Suspect Colic
Time matters with colic. Having a plan in place before it happens makes all the difference.
Step 1: Assess
Take a quick assessment. What's the horse doing? How severe does the pain appear? Check the heart rate if you can. Look at the gums. Note when the horse last ate, drank, and passed manure. This information will be valuable when you call the vet.
Step 2: Call the Vet
Don't wait to see if it gets better on its own. Call your veterinarian and describe what you're seeing. They'll advise whether they need to come out immediately or whether you can monitor for a period. Be honest about the severity - downplaying symptoms can cost your horse valuable time.
Step 3: Remove Food
Take away all hay, grain, and access to pasture. A colicking horse shouldn't eat until the vet has evaluated the situation and given the all-clear.
Step 4: Walking
Gentle hand-walking can help with gas colic by encouraging gut motility and keeping the horse from rolling. Don't exhaust the horse with forced marching - easy, quiet walking is the goal. If the horse wants to lie down quietly and isn't rolling violently, it's generally okay to let them rest.
Step 5: Don't Administer Medications Without Vet Guidance
Giving Banamine or other pain relievers before the vet arrives can mask symptoms and make it harder to assess severity. Ask your vet before administering anything. If they give the go-ahead over the phone, follow their dosage instructions exactly.
Veterinary Treatment
When the vet arrives, they'll perform a thorough examination that typically includes:
- Listening for gut sounds in all four quadrants
- Rectal exam to feel for impactions, displacements, or distended bowel
- Passing a nasogastric tube to check for fluid reflux (fluid backing up from the stomach is a serious sign)
- Pain assessment and management with injectable analgesics
- IV fluids if the horse is dehydrated
- Mineral oil or other laxatives via the nasogastric tube for impactions
Most colic episodes resolve with medical management. Roughly 5 to 10 percent require surgery. Colic surgery is expensive - typically $6,000 to $12,000 or more - and outcomes vary depending on the type and duration of the problem. Having colic surgery insurance or a financial plan is something every horse owner should consider.
Prevention Strategies That Actually Work
You can't prevent every case of colic. But you can significantly reduce the risk with consistent management practices.
Water
Dehydration is one of the biggest colic risk factors. Horses need 5 to 10 gallons of water per day minimum, and more in hot weather or during hard work. In winter, water consumption drops because horses don't like drinking ice-cold water. Heated buckets or tank heaters pay for themselves in prevented vet bills.
Feed Management
- Forage first - Horses are designed to eat fiber continuously. Ensure they have access to hay or pasture for most of the day. Long gaps without forage increase colic risk.
- Change feed slowly - Abrupt changes in hay type, grain, or feeding schedule are a well-documented colic trigger. Any dietary change should happen gradually over 7 to 14 days.
- Avoid large grain meals - If your horse needs grain, split it into multiple small meals rather than one or two large ones. Large starch loads can overwhelm the small intestine and cause fermentation in the hindgut.
Dental Care
A horse that can't chew properly swallows large, poorly processed feed that's harder to digest. Annual dental exams and floating keep teeth functioning correctly, which directly supports digestive health.
Parasite Management
Heavy parasite burdens can cause colic, particularly large strongyles which can damage blood vessels supplying the intestine. Work with your vet on a fecal egg count-based deworming program tailored to your horse.
Exercise and Turnout
Horses that move regularly have healthier gut motility than stall-bound horses. Turnout and exercise are genuinely protective against colic. Sudden changes in activity level - going from daily turnout to stall rest, for example - increase risk.
Sand Prevention
If you're in a sandy area, feed hay in feeders or on mats rather than on the ground. Psyllium husk given periodically can help move sand through the gut, though the evidence on this is mixed. Your vet can do a sand test to check for accumulation.
After a Colic Episode
Once the immediate crisis has passed, reintroduce feed slowly. Start with small amounts of hay and monitor for any return of symptoms. Follow your vet's instructions carefully regarding feeding schedule, turnout, and any medications. Horses that have colicked once are at increased risk for future episodes, so pay extra attention to management practices going forward.
Building a Colic Emergency Plan
Every horse owner should have a written colic plan posted in the barn before an emergency happens. Under stress, people forget things, and having a checklist on the wall makes a real difference. Your plan should include your vet's daytime and after-hours phone numbers, the nearest equine hospital's address and phone number (know the route too), your horse's normal vital signs for comparison, a list of what to do and what not to do while waiting for the vet, and where your first aid supplies are kept including a stethoscope, thermometer, and Banamine if your vet has prescribed it.
Consider colic surgery insurance if you don't already have it. When your horse is thrashing at 2 AM and the vet says surgery is the only option, you don't want finances to be the deciding factor. Several equine insurance companies offer major medical and surgical policies at reasonable annual premiums. The peace of mind alone is worth the cost.
Talk to your barn mates, barn manager, or whoever might discover your horse colicking when you're not there. Make sure they know the signs, know where the emergency information is posted, and know to call both the vet and you immediately. Colic doesn't wait for convenient hours, and having informed people around your horse can save precious time.