What Should You Feed a Horse After Colic?

What Should You Feed a Horse After Colic?

By Dr Duncan Houston

Colic is one of the words horse owners dread most, and for good reason.

It is not one single disease. Colic simply means abdominal pain, and the cause can range from mild gas to impaction, sand accumulation, enteritis, displacement, strangulation, or a surgical emergency. That is why feeding advice after colic cannot be one-size-fits-all.

The right plan depends on what caused the colic, whether the horse is still painful, whether manure is passing, whether gut sounds have returned, whether reflux is present, whether surgery was needed, and what your vet found on examination.

The big principle is simple: do not rush the gut.

Quick Answer

During an active colic episode, remove feed and call your vet. Do not try to force water, oil, electrolytes, or feed into the horse. Once the colic has resolved and your vet says it is safe, many mild cases can return to forage fairly quickly, while grain or concentrates are often reduced or withheld for 1 to 2 days. More serious cases, impactions, obstructions, reflux cases, and surgical colics need a slower, vet-directed feeding plan. Post-colic feeding guidance varies depending on the type of colic and whether surgery occurred.

What Is Colic?

Colic means abdominal pain.

Most equine colic involves the gastrointestinal tract, but colic-like signs can also come from other abdominal problems, including urinary or reproductive disease. The University of Saskatchewan Veterinary Medical Centre describes colic broadly as pain in the abdominal cavity, usually involving the gastrointestinal tract, although other organs can sometimes create similar signs. (vmc)

Common causes include:

• Gas colic

• Large colon impaction

• Sand colic

• Enteritis or colitis

• Parasite-associated disease

• Displacement of the large colon

• Torsion or twist

• Strangulating obstruction

• Enteroliths

• Gastric distension

• Small intestinal obstruction

• Post-operative ileus

• Pain from outside the gut that looks like colic

This is why feeding advice has to follow the diagnosis. A horse recovering from mild gas colic is not the same as a horse recovering from a strangulating small intestinal lesion. Same symptom category. Very different veterinary headache.

Why Feeding Matters During Colic

When the gut is painful, distended, obstructed, inflamed, or not moving properly, adding more feed can make things worse.

In some cases, the horse needs feed withheld to prevent further accumulation of ingesta. Merck notes that with large-intestinal obstruction from dried ingesta, horses may need to be muzzled to prevent further impaction while the obstruction is softening. (Merck Veterinary Manual)

The real concern is not simply “hay versus grain.”

The real concern is whether the gut is able to move material forward safely. If there is obstruction, poor motility, reflux, severe pain, shock, or possible surgical disease, feeding can worsen distension, pain, reflux, or risk of rupture.

That is why the first feeding decision during colic is usually not what to feed.

It is whether to feed at all.

What Should You Do During an Active Colic Episode?

During active colic, the safest immediate plan is:

• Remove hay, grain, treats, and access to bedding the horse may eat

• Call your vet

• Keep the horse in a safe area

• Monitor pain, manure, sweating, gum colour, heart rate if you can safely check it, and whether the horse is worsening

• Walk only if it keeps the horse safer or prevents rolling injury

• Do not exhaust the horse by walking for hours

• Do not give medications unless your vet instructs you

• Do not syringe, hose, drench, or force fluids by mouth

Walking is not a treatment. It is sometimes a safety tool.

If the horse is violently rolling, throwing itself down, sweating heavily, or becoming dangerous, your priority is safety and urgent veterinary help, not trying to “walk it out.”

Why You Should Not Force Water or Oil

Never try to hose water into a colicking horse’s mouth.

Do not syringe large volumes of water, oil, electrolytes, or home remedies. A painful horse may not swallow properly, and forced fluids can be aspirated into the lungs. Also, if there is reflux, obstruction, or poor gastric emptying, adding fluid orally can worsen stomach distension.

A nasogastric tube is a veterinary procedure. Merck notes that passing a stomach tube can release gas or fluid that would otherwise risk stomach rupture, and that fluid therapy may be given through a stomach tube or intravenously depending on the intestinal problem. (Merck Veterinary Manual) (Merck Veterinary Manual)

Very bluntly: a garden hose is not a nasogastric tube. It is a garden hose having a midlife crisis.

Hydration Is a Major Part of Colic Treatment

Many horses with colic benefit from fluid therapy. The goal is to correct dehydration, support circulation, maintain kidney blood flow, soften impactions where appropriate, and correct electrolyte or acid-base problems. MSD Veterinary Manual notes that many horses with colic benefit from fluid therapy, either through a nasogastric tube or intravenously, depending on the type of intestinal problem. (MSD Veterinary Manual)

Fluid decisions depend on the case.

For example, a simple large colon impaction may be treated with enteral fluids through a nasogastric tube and sometimes IV fluids. A horse with strangulating obstruction, enteritis, severe reflux, shock, or poor intestinal absorption may need intravenous fluids instead. MSD specifically notes that horses with strangulating obstruction or enteritis need IV fluids because absorption from the diseased intestine is impaired. (MSD Veterinary Manual)

This is why “just get them drinking” is too simplistic.

Drinking matters, but a sick colic horse may need veterinary fluid therapy before they can safely maintain hydration themselves.

When Can a Horse Eat After Colic?

A horse can usually start eating again when the colic has resolved and your vet confirms it is safe.

Important signs include:

• The horse is no longer painful

• The horse is bright

• Gut sounds are returning

• Manure is passing

• The horse is not refluxing

• The horse is not distended

• Hydration is stable

• There is no surgical concern

• Your vet has cleared feeding

For simple colic with no specific diagnosis, feeding may resume fairly quickly once the horse is pain-free and passing faeces. Post-colic nutrition guidance published in ModernEquineVet states that horses with simple colic may return to a normal feeding regimen fairly quickly, but forage is usually favoured while concentrate is reduced or withheld for 1 to 2 days to limit excess gas production.

That does not mean every horse gets a full dinner as soon as they look better.

It means the gut has to prove it is back online first.

Why Forage Is Usually Safer Than Grain After Colic

Forage is the base of the equine diet. It supports chewing, saliva production, gut fill, hindgut fermentation, and normal motility.

Grain and concentrates are more calorie-dense and often higher in starch. In a gut that has recently been painful, distended, obstructed, or slow, rushing back to concentrates can increase fermentation, gas, and digestive upset.

AAEP’s colic prevention guidance recommends feeding a high-quality diet primarily made of roughage, avoiding excessive grain and energy-dense supplements, and dividing concentrate into smaller meals rather than one large feeding.

So after colic, the usual mindset is:

Start with safe forage.

Be cautious with concentrates.

Go slower than the owner’s anxiety wants you to.

A Practical Feeding Plan After Mild Colic

This is only for a horse that has been examined or cleared by a vet, is no longer painful, has no reflux, has manure passing, and has no surgical concern.

First 12 to 24 Hours After Signs Resolve

Offer small amounts of good-quality forage.

This may include:

• Small handfuls of soft grass hay

• Small amounts of hand grazing if appropriate

• Soaked hay if hydration is a concern

• Soaked hay cubes or pellets if the horse has dental problems

Avoid grain, sweet feed, large concentrate meals, rich new feeds, bran mashes that are not part of the usual diet, and sudden diet experiments.

Monitor closely for:

• Appetite

• Manure

• Water intake

• Gut sounds if you know how to check them

• Pain returning

• Sweating

• Pawing

• Lying down

• Dullness

Next 24 to 48 Hours

If the horse remains bright, comfortable, eating, drinking, and passing manure, forage can usually be increased gradually.

Concentrates are often still reduced or withheld during this period, especially if the original episode may have been gas-related, feed-related, or impaction-related.

Day 3 Onward

If the horse remains normal, concentrates may be slowly reintroduced if the horse actually needs them.

Start with a small fraction of the usual amount and increase gradually over several days. If pain, reduced manure, dullness, reduced appetite, or abdominal discomfort returns, stop and call your vet.

The mistake I see most often is not owners caring too little. It is owners being so relieved the horse is eating again that they feed too much, too soon. The gut has just filed a complaint. Do not immediately send it a buffet.

Feeding After Impaction Colic

Impaction colic needs more caution.

In large colon impactions, feed may be withheld while fluids and softening agents are working. Merck notes that impactions are commonly caused by obstruction of the large colon by dehydrated ingesta, sometimes mixed with sand, and that lubricants or fecal-softening agents are given through a nasogastric tube to help soften the material. (MSD Veterinary Manual)

Once the impaction is resolving and your vet allows feeding, the plan is usually small, frequent, moist, forage-based meals.

Useful options may include:

• Soaked hay

• Fresh grass in short supervised amounts

• Soaked hay pellets

• Soaked hay cubes

• Small amounts of good-quality soft hay

• Wet mashes based on the horse’s normal feed, if appropriate

Avoid dry, bulky, stemmy, coarse feed if the vet is still concerned about impaction. Avoid sudden large hay meals. Avoid grain unless specifically advised.

Hydration is essential. Merck’s nutrition guidance notes that inadequate water access decreases feed intake and increases the risk of impaction colic. (Merck Veterinary Manual)

Feeding After Surgical Colic

Post-surgical feeding must follow the hospital’s discharge plan.

This is not the time for stable-yard democracy.

The plan depends on:

• What part of the gut was affected

• Whether intestine was resected

• Whether there was strangulation

• Whether reflux is present

• Whether motility has returned

• Whether diarrhoea is present

• Whether the horse is passing manure

• Whether there is endotoxaemia risk

• Whether the incision is healing

• Whether appetite has returned

Post-colic nutrition guidance notes that after small or large intestinal resection, feed and water should only be introduced when there is evidence of gastric motility and no gastric reflux, with small frequent meals often used initially. It also notes that grain concentrates are commonly avoided for around 10 to 14 days after surgery.

That is not because grain is evil.

It is because the post-surgical gut needs controlled, gentle work while healing.

Risk Framework: How Worried Should You Be?

Low Risk

This is usually lower risk if your horse:

• Had mild colic that resolved quickly

• Was assessed by a vet

• Is bright and comfortable

• Is eating small amounts of forage

• Is drinking

• Is passing manure

• Has normal gum colour

• Has no fever

• Has no reflux

• Has no distension

• Has no recurring pain

This horse may only need a cautious return to forage, delayed concentrate reintroduction, and close monitoring.

Moderate Risk

This is more concerning if your horse:

• Needed pain relief

• Had reduced gut sounds

• Had reduced manure output

• Had mild dehydration

• Had a suspected impaction

• Is eating but not normally

• Is drinking less than usual

• Is quieter than normal

• Has not fully returned to normal manure

• Has had colic before

This horse needs a slower feeding plan and close veterinary guidance.

High Risk

This is high risk if your horse:

• Has repeated pain after medication wears off

• Has persistent reduced gut sounds

• Has no manure

• Has significant dehydration

• Has abnormal gum colour

• Has elevated heart rate

• Has reflux

• Has abdominal distension

• Has fever

• Has diarrhoea

• Has suspected obstruction, displacement, enteritis, colitis, or sand impaction

• Recently had colic surgery

This horse should not be fed casually. Feeding should follow direct veterinary instructions.

Critical

This is an emergency if your horse:

• Has severe or uncontrollable pain

• Throws itself down

• Rolls violently

• Sweats heavily

• Has a high heart rate

• Has purple, brick-red, pale, grey, or very dry gums

• Has delayed capillary refill time

• Has severe distension

• Has repeated reflux

• Has no gut sounds

• Has shock signs

• Collapses

• Becomes weak or depressed

• Has pain that returns after medication

MSD lists common indications for colic surgery as including uncontrollable pain, more than 4 litres of gastric reflux, no gut sounds, abnormal peritoneal fluid findings, tightly distended intestine, displaced colon, enterolith, or foreign body, and stresses that early surgery when indicated is critical to survival. (MSD Veterinary Manual)

This is a vet-now situation.

When Is This an Emergency?

Treat colic as urgent if your horse has:

• Repeated pawing

• Looking at the flank

• Kicking at the belly

• Rolling

• Repeated lying down

• Sweating

• Stretching as if to urinate

• Loss of appetite

• Depression

• Abdominal distension

• Reduced or absent manure

• Pain that returns after medication

• High heart rate

• Abnormal gum colour

• Dry gums

• Delayed capillary refill time

• Fever

• Diarrhoea

• Weakness

• Collapse

AAEP states that colic can range from mild to severe, should never be ignored, and that many causes can become life-threatening in a relatively short time.

Do not wait to see if a severe colic “settles overnight.” Horses are very good at turning digestive drama into an invoice with surgical lighting.

What Else Can Look Like Colic?

Not every horse showing abdominal discomfort has a simple gut problem.

Important rule-outs include:

• Gastric ulcers

• Impaction

• Gas colic

• Sand colic

• Enteritis or colitis

• Large colon displacement

• Torsion or strangulating obstruction

• Enteroliths

• Parasite-associated disease

• Foaling or reproductive pain

• Urinary tract disease

• Kidney pain

• Liver disease

• Severe tying-up

• Peritonitis

• Pleuropneumonia or chest pain

• Dental disease causing poor chewing and impaction risk

• Poor water intake

• Feed changes

• Toxic plants or contaminated feed

Merck notes that history matters during colic assessment, including feed or water changes, manure passage, pain severity, deworming history, dental history, and response to previous treatment. (Merck Veterinary Manual)

That is why you should tell your vet exactly what changed, even if it seems small.

New hay. New paddock. Missed water. Feed-room break-in. Dental issues. Sand exposure. Weather change. Travel. Reduced turnout. All of it matters.

What Should You Do Next After Colic?

1. Follow the Vet’s Specific Diagnosis

Ask your vet what type of colic they suspect.

The feeding plan changes depending on whether the horse had gas colic, impaction, sand, enteritis, colitis, obstruction, displacement, or surgery.

“Colic” is not enough detail for a recovery plan.

2. Confirm When Feeding Can Restart

Before feeding, confirm:

• Is the horse pain-free?

• Are gut sounds present?

• Has manure passed?

• Is there reflux?

• Is the horse hydrated?

• Is water allowed freely?

• Should feed be withheld longer?

• Should concentrates be avoided?

• Should hay be soaked?

• Should forage be restricted or increased?

Your vet may give different instructions depending on the case.

3. Start With Small Amounts

Start with small, frequent forage offerings rather than a full hay net or normal meal.

For some cases, 1 lb of forage every few hours is used so intake and gut response can be monitored. Post-colic feeding guidance for impaction, strangulation, and obstruction cases recommends small frequent feedings once colic has resolved and fecal transit is confirmed.

4. Delay Grain and Concentrates

For many mild cases, concentrate is reduced or withheld for 1 to 2 days. For surgical cases, grain may be avoided for 10 to 14 days or longer depending on the hospital plan.

If the horse does not need grain, do not rush to restart it.

5. Monitor Water Closely

A 500 kg adult horse in minimal work may drink around 21 to 29 litres per day on a mixed hay and grain ration or pasture, and water intake may increase substantially with dry hay, lactation, sweating, or heat. Unlimited free access to clean water is recommended in normal management. (Merck Veterinary Manual)

After colic, monitor water intake carefully.

Call your vet if the horse:

• Is not drinking

• Has tacky gums

• Has reduced manure

• Has dark urine

• Is dull

• Is still painful

• Has diarrhoea

• Has signs of dehydration

6. Track Manure

Manure is one of your best recovery clues.

Monitor:

• Has manure passed?

• How much?

• Is it dry?

• Is it loose?

• Is there diarrhoea?

• Is there sand?

• Is output decreasing again?

Reduced manure after colic is a reason to be cautious. No manure with pain is a reason to call the vet.

7. Reintroduce Normal Diet Slowly

Once the horse is stable, return to normal feeding gradually.

Purdue Extension recommends avoiding sudden changes in feed type or amount and making changes gradually over 7 to 10 days. (Purdue University - Extension)

The British Horse Society similarly recommends gradual feed changes over 10 to 14 days to reduce colic risk. (The British Horse society)

The exact timeframe after colic depends on the diagnosis, but the principle stands: sudden changes are not your friend.

Common Mistakes Owners Make

Feeding Too Soon

If the horse is still painful, distended, refluxing, or not passing manure, feeding can worsen the problem.

Giving a Full Hay Net Immediately

Even forage can be too much if the gut is not ready. Start small if your vet advises refeeding.

Rushing Back to Grain

Grain and concentrates are often the last part of the diet to return, not the first.

Using Bran Mash as a Magic Cure

A bran mash is not a treatment for colic. If it is not part of the horse’s normal diet, it is also a sudden feed change.

Forcing Water or Oil

Do not hose, syringe, or drench a colicking horse. Use veterinary-administered fluids when needed.

Ignoring Manure Output

A horse eating after colic but not passing manure is still a concern.

Assuming Pain Relief Means the Colic Is Fixed

Pain medication can make the horse look better while the underlying problem remains. MSD warns that some stronger analgesics can mask signs useful for diagnosis, which is why examination before medication is important when possible. (MSD Veterinary Manual)

How To Prevent Colic Through Feeding

Not every colic can be prevented, but management matters.

AAEP’s prevention advice includes maintaining a daily feeding and exercise routine, feeding a high-quality diet primarily based on roughage, avoiding excessive grain and energy-dense supplements, dividing concentrates into smaller meals, using a regular parasite control program, providing turnout or exercise, giving fresh clean water, avoiding ground feeding in sandy soils, checking feed and environment for toxic material, and reducing stress during transport or environment changes.

A practical prevention plan includes:

• Feed mostly forage

• Keep feed changes gradual

• Weigh feed and hay

• Avoid large grain meals

• Split concentrates into smaller meals if needed

• Provide clean water at all times

• Use soaked feeds or soaked hay when hydration is a concern

• Maintain dental care

• Use strategic parasite control

• Avoid mouldy or dusty feed

• Reduce sand intake

• Provide turnout and movement

• Manage stress during travel, shows, and yard changes

• Review the diet after any colic episode

The goal is boring consistency. Horses love boring consistency. Their digestive tracts are tiny bureaucrats with strong opinions.

Will My Horse Be Okay?

Many horses recover well from mild colic, especially when pain resolves quickly, manure passes, hydration is maintained, and feeding is reintroduced carefully.

The outlook is more guarded when there is severe pain, recurring pain, reflux, shock, poor gut sounds, dehydration, diarrhoea, obstruction, strangulation, enteritis, colitis, or surgery. MSD notes that some surgical causes of colic become fatal without rapid intervention, especially when obstruction interferes with intestinal blood supply. (MSD Veterinary Manual)

The most important thing is not to treat every colic the same.

A mild gas colic and a surgical strangulation can start with similar owner observations. The difference is what happens over time, what the vet finds, and how the horse responds.

If your horse has had colic, the safest question is not “When can I feed normally?”

It is “What did the gut just go through, and what is the safest way to restart it?”

FAQs

Can I feed my horse during colic?

Usually, feed should be removed during active colic until your vet advises otherwise. Feeding a horse with obstruction, impaction, reflux, poor motility, or surgical disease can worsen the problem.

When can my horse eat hay after colic?

Many mild cases can start small amounts of forage once the horse is pain-free, passing manure, and cleared by the vet. More serious cases need a slower plan.

When can I give grain after colic?

For simple colic, concentrates are often reduced or withheld for 1 to 2 days. After surgical colic, grain may be avoided for 10 to 14 days or longer depending on the hospital discharge plan.

Should I give bran mash after colic?

Not unless your vet recommends it. Bran mash is not a colic treatment, and if your horse is not used to it, it is a sudden feed change.

What should I watch for after feeding again?

Watch for pain returning, reduced appetite, reduced manure, dry manure, diarrhoea, dullness, sweating, pawing, lying down, reduced drinking, abdominal distension, or any change from normal.

Final Thoughts

Feeding after colic is about patience, diagnosis, and gut function.

The safest plan is not always the fastest return to normal. Mild colic may only need a short period of careful forage reintroduction and delayed concentrates. Impactions may need hydration-focused management. Surgical colics need strict discharge instructions. Horses with reflux, poor motility, or recurring pain should not be fed casually.

The key decision points are simple:

Is the horse pain-free?

Is manure passing?

Is hydration stable?

Has your vet cleared feeding?

If the answer is not clearly yes, slow down and get guidance.

A horse recovering from colic does not need a heroic dinner. It needs a careful restart.

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If you are unsure what to feed after a colic episode, or whether your horse’s appetite, manure, water intake, or comfort level is normal during recovery, ASK A VET™ can help you work through the signs and decide what needs urgent veterinary attention.