How to Decrease Winter Colic in Horses

How to Decrease Winter Colic in Horses

By Dr Duncan Houston

Winter is one of the most common times for horses to get into trouble with impaction colic. The reason is usually not one dramatic mistake. It is a combination of small changes that build up: colder water, lower water intake, drier forage, less movement, and sudden weather shifts. By the time a horse is showing clear signs of discomfort, the gut may already be struggling.

This is especially important in places where the temperature swings sharply rather than staying consistently cold. Horses do not just respond to “winter.” They respond to changes in routine, hydration, turnout, and feed type. The good news is that many winter colic cases are preventable if you focus on the basics early.

Quick Answer

Winter colic in horses is most often linked to reduced water intake, drier diets, less turnout, and slower gut movement during cold weather. The best prevention strategy is to keep horses drinking well, feed plenty of forage, avoid sudden diet changes, and maintain regular movement. If manure output drops, appetite changes, or your horse seems uncomfortable, do not wait to see if it passes.

Why Colic Is More Common in Winter

Colic is not one disease. It is a general term for abdominal pain, and in winter one of the most common forms is impaction colic.

Why risk rises in colder weather:

• horses often drink less

• hay contains far less moisture than fresh pasture

• movement may decrease with more stabling or poor weather

• cold snaps can change appetite and gut motility

• sudden weather swings may disrupt routine and intake

In practice, winter colic is often a hydration problem first and a gut motility problem second.

Why Water Intake Drops in Cold Weather

This is one of the biggest drivers of winter colic.

Many horses drink less in winter because:

• cold water is less appealing

• thirst drive can seem lower

• they are eating drier forage

• buckets or troughs may be partially frozen

• owners may not realize how much intake has dropped

A horse can look normal while slowly becoming underhydrated. That is why winter impactions can creep up rather than explode out of nowhere.

Decision checkpoint

If your horse is eating mostly dry hay and you are not actively encouraging water intake, winter colic risk is already higher.

How Worried Should You Be?

Low risk

• horse is drinking normally

• manure output is normal

• turnout and movement are consistent

• diet has not changed suddenly

Action: Keep management steady and keep monitoring.

Moderate risk

• colder weather has reduced drinking

• turnout is limited

• horse is eating more dry hay

• manure is slightly drier or less frequent

Action: Increase hydration support and watch closely.

High risk

• horse is drinking poorly

• manure output has clearly dropped

• appetite is slightly reduced

• exercise or turnout is much lower than usual

Action: Act quickly to improve hydration and monitor for early colic signs.

Critical risk

• signs of colic are already present

• horse is pawing, rolling, flank watching, or repeatedly lying down

• manure output is very reduced or absent

• horse seems dull or uncomfortable

Action: Call your veterinarian promptly.

The Main Winter Colic Risks

Reduced water intake

This is the biggest one.

Dry forage

Horses often move from fresh pasture to mostly hay, which gives the gut less moisture to work with.

Less movement

Stabled horses or horses turned out less often tend to have slower gut motility.

Sudden feed changes

Switching forage or increasing concentrates too quickly can upset the gut.

Weather swings

It is not always the deepest cold that causes problems. Sudden temperature shifts can disrupt drinking, appetite, and routine.

How to Increase Water Intake

If you want to reduce winter colic risk, this is the first place to focus.

Offer warmer water

Many horses drink better when the water is not icy cold.

Use heated buckets or troughs where safe and practical

This can make a real difference in colder conditions.

Check water access multiple times a day

Do not assume the water source is fine just because it was fine in the morning.

Add water to feed where appropriate

Wet feeds, soaked beet pulp, or dampened meals can help increase total water intake.

Consider soaking some forage when appropriate

This may help some horses, especially poor drinkers.

Use electrolytes carefully

These can be useful in some horses, but they need to make sense for the horse and the overall feeding plan.

The mistake I see most often is owners assuming the horse will drink what it needs. In winter, that assumption is not always safe.

Feed More Forage, Not Just More Calories

In cold weather, horses often need more energy, but the way you provide it matters.

Why forage helps

Fiber fermentation generates heat and supports gut function.

Why grain is not the best first answer

Rapid increases in concentrates can increase digestive upset and may worsen colic risk in some horses.

What usually works best

• increase forage first

• use good-quality hay

• make feed changes gradually

• avoid large sudden jumps in grain

A horse’s winter diet should support hydration and gut movement, not just calorie intake.

Why Movement Matters

A horse that moves regularly usually has better gut motility than a horse standing still for long periods.

Winter movement strategies:

• daily turnout where possible

• hand walking if turnout is limited

• regular exercise within the horse’s fitness and footing limits

• avoiding long periods of unnecessary confinement

Even modest movement helps. The goal is not perfect training. It is keeping the gut active.

What Early Warning Signs Should You Watch For?

Winter colic often gives warnings before it becomes severe.

Watch for:

• reduced manure output

• smaller, drier manure balls

• reduced appetite

• unusual quietness

• flank watching

• pawing

• stretching out

• repeated lying down and getting up

• dullness after a cold snap

• less interest in water

Decision checkpoint

If your horse is eating less, passing less manure, and drinking poorly, do not brush it off as “just the weather.”

When Is This an Emergency?

Call your veterinarian promptly if your horse has:

• pawing or rolling

• repeated lying down

• obvious abdominal discomfort

• reduced or absent manure output

• refusal to eat

• persistent dullness

• signs that are worsening over hours, not improving

Colic is one of those problems where waiting to “see what happens” can turn a manageable case into a much more serious one.

What To Do Right Now to Reduce Winter Colic Risk

1. Check how much your horse is actually drinking
   Do not guess.

2. Make water easier to drink
   Warmer water often helps.

3. Increase forage gradually if more calories are needed
   Do not just add grain quickly.

4. Keep your horse moving
   Turnout and walking matter.

5. Watch manure closely
   This is one of the earliest clues.

6. React early to changes
   A horse that starts drinking less and passing less manure needs attention before colic develops.

Common Mistakes Owners Make

Assuming horses drink enough on their own in winter

Many do not.

Feeding more grain instead of more forage

That often fixes the wrong problem.

Ignoring reduced manure output

This is an important early warning sign.

Keeping horses in too much during bad weather

Less movement increases risk.

Making sudden feed changes during cold snaps

The gut does better with consistency.

Prevention Strategy at a Glance

FAQs

Why do horses get more colic in winter?

Mostly because they drink less, eat drier forage, and often move less.

Is warm water really better for horses in winter?

Many horses do drink better when water is less cold.

Should I feed more grain in winter?

Usually increase forage first. Grain should not be the automatic answer.

Can reduced manure output be an early sign of impaction?

Yes. It is one of the most useful early warnings.

Are sudden temperature swings a problem for horses?

Yes. Changes in weather can affect intake, hydration, and routine enough to increase risk.

Final Thoughts

Winter colic prevention is usually not about one special product or one clever trick. It is about getting the fundamentals right every day: hydration, forage, movement, and consistency.

If you stay ahead of those four things, you reduce the chances of the gut slowing down enough to cause trouble. And if your horse starts drinking less, eating less, or passing less manure, take it seriously early. That is often the moment where you still have time to prevent a much bigger problem.

If you are unsure whether your horse’s winter routine is increasing colic risk, or whether subtle changes in manure, appetite, or drinking are enough to worry about, ASK A VET™ can help you think through the next step clearly.