What Should You Feed a Foal?

What Should You Feed a Foal?

By Dr Duncan Houston

Foal nutrition starts before the foal is born.

The mare’s diet, colostrum quality, milk production, pasture, creep feed, growth rate, minerals, exercise, and weaning plan all shape how that foal develops. Good nutrition does not mean pushing a foal to grow as fast as possible. In fact, that is one of the biggest mistakes owners can make.

The goal is steady, balanced growth.

A foal that grows too quickly, becomes overweight, misses key minerals, fails to receive enough colostrum, or is weaned before eating properly can end up with avoidable health problems. Some are minor. Others, like failure of passive transfer, sepsis, choke, diarrhoea, or developmental orthopaedic disease, can become serious very quickly.

Quick Answer

A healthy foal should receive colostrum in the first hours of life, nurse regularly from the mare, have access to clean water and safe forage, and gradually learn to eat a balanced foal creep feed before weaning. The mare’s milk is the main nutrition source early on, but foals begin nibbling feed within the first month, and by around 4 months their nutrient needs may exceed what milk alone provides. (Merck Veterinary Manual)

Do not free-feed grain to foals. The aim is not rapid growth. The aim is steady growth with the right energy, protein, calcium, phosphorus, copper, zinc, turnout, and veterinary monitoring.

The First Rule: Newborn Foals Are Time-Critical

The first day of life is not just about feeding.

It is about survival, immunity, energy, hydration, and making sure the foal transitions properly from life inside the uterus to life outside it.

A healthy newborn foal should usually:

• Sit upright shortly after birth

• Stand within 1 hour

• Nurse within 2 hours

• Have the mare pass the placenta within 3 hours

• Pass meconium within the first several hours

Colorado State University describes this as the “1-2-3 rule”: stand within 1 hour, nurse within 2 hours, and placenta passed within 3 hours. They also recommend a new foal exam and IgG blood test between 12 and 24 hours after birth. (Vet Med & Bio Sciences)

If a foal is weak, slow to stand, not nursing, not swallowing properly, or milk is coming from the nostrils, do not wait. Foals can deteriorate quickly.

Colostrum Is Not Optional

Colostrum is the mare’s first milk. It contains antibodies that protect the foal against infection.

Foals are born with very little immune protection. They rely on absorbing antibodies from colostrum during the first hours of life. Merck Veterinary Manual notes that healthy foals begin suckling colostrum within 1 to 2 hours, and that a 50 kg foal needs at least 1.5 to 2 litres of good-quality colostrum in the first 12 to 18 hours. After 18 to 24 hours, oral colostrum has much less benefit because the intestine can no longer absorb large antibody molecules efficiently. (Merck Veterinary Manual)

This is why IgG testing matters.

A foal can look like it is nursing but still fail to receive or absorb enough antibodies. Failure of passive transfer is one of the most important neonatal foal risks, and low IgG may require veterinary treatment with colostrum, plasma products, or plasma transfusion depending on timing and severity. (Merck Veterinary Manual)

In practice, I would rather test IgG and be reassured than assume everything is fine because the foal looks cute and wobbly.

Cute is not an immune system.

What Should the Mare Eat During Pregnancy and Lactation?

A foal’s nutrition begins with the mare.

The mare needs enough energy, protein, minerals, vitamins, salt, and water to support pregnancy, foaling, and milk production. Late pregnancy and early lactation are the most demanding periods.

For most mares, the base of the diet should be:

• Good-quality forage

• Clean water at all times

• Salt

• A balanced broodmare feed or ration balancer if forage alone does not meet requirements

• Additional concentrate only when body condition, forage quality, pregnancy stage, or lactation demands require it

Water is especially important. MSD Veterinary Manual notes that lactating mares need 12 to 14 litres of water per 100 kg body weight to support health and milk production, and unlimited clean water is recommended. (MSD Veterinary Manual)

Do not let the mare become too thin during lactation. If the mare is losing condition, milk production may suffer, and the foal may start falling behind.

Do not let the mare become obese either. Overfeeding the mare and foal can push excessive growth and increase orthopaedic risk.

What Does a Foal Eat in the First Month?

For the first several weeks, the foal’s main diet is mare’s milk.

A normal foal nurses frequently. In the first weeks, foals may nurse many times per hour, and reduced nursing vigour can be an early sign of illness. Merck Animal Health notes that listlessness and decreasing nursing vigour in young foals are early warning signs that should prompt concern. (Merck Animal Health USA)

A healthy foal should be:

• Bright

• Curious

• Nursing strongly

• Resting between feeds

• Passing manure

• Urinating normally

• Growing steadily

• Moving comfortably

• Showing normal limb development

Foals often start nibbling at the mare’s feed, hay, grass, or creep feed during the first month. That does not mean they are ready to live on grain. It means they are learning.

The digestive system is developing. The feeding plan should support that process, not overwhelm it.

When Should Foals Start Creep Feed?

Creep feeding means offering feed that only the foal can access, separate from the mare.

It can be helpful, but it needs to be controlled. The point of creep feed is not to make the foal fat. It is to provide balanced nutrients when milk alone is no longer enough and to prepare the foal for weaning.

Oklahoma State University Extension notes that foals receive nutrition from the mare’s milk for the first several weeks to one month, may begin eating small amounts of grain during the first month, and often consume substantial amounts by 2 to 3 months if given access. By around 4 months, the foal’s nutrient needs may exceed what is available from the mare’s milk. (extension.okstate.edu)

A practical approach:

• Introduce small amounts gradually.

• Use a feed formulated for growing foals, not adult maintenance feed.

• Feed measured amounts.

• Keep meals small and frequent.

• Keep the feeder clean.

• Make sure the mare cannot steal the foal feed.

• Monitor body condition and limb development.

If the mare has excellent milk production, good pasture is available, and the foal is growing steadily, creep feed may be minimal early on. If the mare is losing condition, has poor milk, the foal is large, or weaning is planned earlier, creep feeding becomes more important.

Why Free-Choice Grain Is Risky

Foals do not need unlimited grain.

Free-choice grain can cause excessive calorie intake, rapid weight gain, erratic growth, and increased risk of developmental orthopaedic disease. This is especially important in large, fast-growing foals and breeds already predisposed to orthopaedic problems.

Rutgers notes that developmental orthopaedic disease is multifactorial, with genetics, nutrition, and exercise all playing roles. The same source warns that it is often erratic growth, not simply fast growth, that becomes a problem, and that foals should not become obese. (esc.rutgers.edu)

This is the main clinical point:

A foal does not need to be the biggest foal in the paddock.

A foal needs to grow evenly, stay sound, and build strong bone and soft tissue.

What Nutrients Matter Most for Foal Growth?

Foals need more than calories.

A good foal diet must provide:

• Energy for growth

• High-quality protein

• Lysine and other amino acids

• Calcium

• Phosphorus

• Copper

• Zinc

• Selenium, depending on region and forage

• Vitamin E

• Salt

• Clean water

• Safe fibre

MSD Veterinary Manual provides nutrient requirement tables for growing horses and shows that energy, protein, calcium, phosphorus, and vitamin A needs vary with age, body weight, and growth rate. These values should be treated as starting points because individual needs vary. (MSD Veterinary Manual)

Minerals matter because the skeleton is developing rapidly. Rutgers notes that deficiencies of calcium, phosphorus, and copper can contribute to defective bone maturation, and that mineral imbalances are well documented contributors to developmental orthopaedic disease. (esc.rutgers.edu)

The common mistake is focusing only on protein and calories.

Protein helps. Calories help. But poor mineral balance can quietly sabotage the whole plan.

What About Forage?

Foals should learn to eat forage early.

Good-quality pasture or hay supports gut development, chewing behaviour, and steady fibre intake. Foals raised with access to safe pasture and turnout generally get more natural movement, which supports bone and muscle development.

Forage should be:

• Clean

• Mould-free

• Dust-free

• Soft enough for the foal to manage

• Free of toxic weeds

• Matched to the mare and foal’s needs

Avoid poor-quality, stemmy, dusty, or mouldy hay. Foals have less spare room when things go wrong, and respiratory or digestive issues can escalate quickly.

Why Exercise and Turnout Matter

Nutrition is only one part of foal growth.

Exercise matters too.

Rutgers explains that restriction of exercise can adversely affect bone growth and development, while excessive forced exercise or concussion may also increase developmental orthopaedic risk. The recommendation is turnout in as large an area as possible, ideally with long periods of free movement, while avoiding strenuous forced exercise such as lunging young foals in circles. (esc.rutgers.edu)

In plain English:

Let foals move like foals.

Do not lock them up unnecessarily, but do not “train” them like adult horses either.

Risk Framework: How Worried Should You Be?

Low Risk

This is usually lower risk if the foal:

• Stood within 1 hour

• Nursed within 2 hours

• Had IgG checked and adequate passive transfer confirmed

• Is bright and active

• Nurses strongly and frequently

• Has normal manure and urination

• Is growing steadily

• Has straightening limbs and normal movement

• Has access to good forage, clean water, and safe turnout

• Is eating small measured amounts of appropriate foal feed before weaning

This foal still needs routine monitoring, but the basics are reassuring.

Moderate Risk

This is more concerning if the foal:

• Is slow to learn creep feed

• Is falling behind other foals

• Has a mare losing weight or producing questionable milk

• Has mild diarrhoea but remains bright

• Is growing unevenly

• Is becoming too heavy

• Has mild limb deviation or tendon tightness

• Has not had IgG checked

• Is approaching weaning but not eating confidently

This foal needs closer monitoring and a vet-guided nutrition review.

High Risk

This is high risk if the foal:

• Had delayed nursing

• Has low or unknown IgG

• Is weak, dull, or not nursing strongly

• Has persistent diarrhoea

• Has fever

• Is losing weight

• Has swollen joints

• Has limb deformity worsening over days

• Is pot-bellied and poor-doing

• Is choking or coughing with feed

• Is orphaned or rejected

• Is being overfed grain and growing too fast

This foal needs veterinary input. Do not try to solve these problems with feed alone.

Critical

This is urgent if the foal:

• Does not stand within expected time

• Does not nurse within 2 to 3 hours

• Has milk coming from the nose

• Is depressed or weak

• Has fever or low temperature

• Has signs of colic

• Cannot pass meconium

• Has severe diarrhoea

• Has swollen painful joints

• Has difficulty breathing

• Cannot rise

• Has a mare that has no milk, rejects the foal, or is seriously unwell

This is a call-the-vet-now situation.

When Is Foal Nutrition an Emergency?

Foal feeding becomes an emergency when nutrition, immunity, or gut function is failing.

Call your vet urgently if:

• The foal has not nursed by 2 to 3 hours

• The foal is weak, dull, or unable to stand

• Milk comes from the nostrils

• The foal does not pass meconium

• The foal has colic signs

• The foal has severe or persistent diarrhoea

• The foal has fever, depression, or reduced nursing

• The foal has swollen joints

• The umbilicus is wet, swollen, painful, or draining

• The mare has no milk or rejects the foal

• The mare has retained placenta

• The foal’s IgG is low or unknown after delayed nursing

Merck Veterinary Manual notes that weak or sick neonates that do not stand or nurse successfully within 2 to 4 hours should be supplemented with colostrum early, commonly by bottle or tube, under veterinary direction. (Merck Veterinary Manual)

This is not the time for internet feeding recipes.

Newborn foals can crash quickly. Get help early.

What Else Can Look Like a Nutrition Problem?

Not every small, slow, thin, or weak foal has a simple feeding issue.

Important rule-outs include:

• Failure of passive transfer

• Sepsis

• Prematurity

• Dysmaturity

• Dummy foal syndrome

• Meconium impaction

• Diarrhoea from infectious causes

• Pneumonia

• Joint ill

• Umbilical infection

• Congenital defects

• Poor mare milk production

• Mare rejection

• Choke

• Developmental orthopaedic disease

• Parasites in older foals

• Poor pasture or hay

• Overfeeding grain

• Incorrect calcium, phosphorus, copper, or zinc balance

In practice, the foal that worries me most is not just the small one.

It is the foal that is quiet, not nursing strongly, lying down more than expected, not gaining weight, or has diarrhoea, fever, swollen joints, or changing limb posture.

Nutrition matters. But illness must not be missed.

What Should You Do Next?

1. Get the First 24 Hours Right

Record the time of:

• Birth

• Standing

• First nursing

• Placenta passage

• Meconium passage

• First urination

Arrange a new foal check and IgG test at 12 to 24 hours. Colorado State University recommends a foal exam and blood sample for IgG in that window to confirm passive transfer. (Vet Med & Bio Sciences)

If the foal misses the 1-2-3 milestones, call your vet.

2. Support the Mare First

The mare is the foal’s first feeding plan.

Check:

• Body condition

• Appetite

• Milk production

• Udder comfort

• Water intake

• Forage quality

• Broodmare feed suitability

• Salt and mineral intake

• Pain or illness after foaling

A mare that is thin, painful, dehydrated, febrile, or not eating well may not support the foal properly.

3. Watch the Foal Nurse

Do not just assume nursing is happening.

Watch for:

• Latching

• Strong suckling

• Swallowing

• Milk on the muzzle

• Udder emptying

• Nursing frequency

• Foal energy after nursing

• Milk coming from the nose

Cornell notes that owners should watch the foal’s tongue seal around the nipple, active suckling and swallowing, and whether the mare’s udder empties. Milk from the nostrils can indicate swallowing problems. (Cornell Vet College)

4. Introduce Creep Feed Gradually

Use a feed made for growing foals.

Keep it:

• Measured

• Fresh

• Clean

• Safe from mare access

• Split into small amounts

• Adjusted to growth and body condition

Do not let feed sit and spoil. Oklahoma State’s weanling guidance recommends offering only a 24-hour ration in creep feeders to reduce spoilage and health risks, and cleaning feeders routinely.

5. Monitor Growth, Not Just Size

Track:

• Weight or estimated weight

• Body condition

• Limb straightness

• Tendon tightness

• Joint swelling

• Hoof balance

• Appetite

• Manure

• Activity level

• Nursing behaviour

• Weaning readiness

Merck Animal Health notes that by six months, a foal may have reached about 80% of mature height and around half of mature weight, so early nutrition and growth monitoring matter. (Merck Animal Health USA)

Big is not the goal.

Correct is the goal.

6. Prepare for Weaning Before Weaning Day

Weaning should not be a nutritional cliff.

Before weaning, the foal should already be:

• Eating forage well

• Eating appropriate creep feed confidently

• Drinking water

• Healthy

• Growing steadily

• Socially settled

• Used to the environment where possible

Most managed systems wean foals around 4 to 6 months, while natural weaning may occur closer to 8 to 9 months. Oklahoma State notes that weaning before 4 months can increase stress, especially if the foal is not eating grain or is heavily dependent on the mare.

The foal should not discover solid food and emotional trauma on the same day. That is a poor onboarding experience.

Common Feeding Mistakes With Foals

Missing Colostrum Timing

If the foal does not receive and absorb colostrum early enough, the problem cannot be fixed later with normal feeding.

Not Testing IgG

A foal can appear to nurse but still have poor passive transfer. Testing is simple and important.

Free-Feeding Grain

Unlimited grain can drive excessive or erratic growth and increase orthopaedic risk.

Feeding Adult Horse Feed to Foals

Foals need a diet balanced for growth, especially minerals and amino acids.

Ignoring the Mare

A poor-doing mare often means a foal nutrition problem is coming.

Weaning Before the Foal Is Eating Properly

Foals should be prepared nutritionally before separation.

Keeping Foals Too Confined

Safe turnout supports normal bone and muscle development. Forced exercise is not appropriate, but free movement is important.

Thinking Supplements Fix an Unbalanced Diet

A supplement cannot rescue poor forage, no colostrum, excessive grain, or missing minerals.

How To Prevent Foal Nutrition Problems

The strongest prevention plan starts before birth.

Focus on:

• Keeping the mare in appropriate body condition

• Feeding balanced late-pregnancy and lactation nutrition

• Providing clean water and salt

• Vaccinating the mare appropriately before foaling under veterinary guidance

• Having a colostrum plan

• Attending foaling where possible

• Following the 1-2-3 rule

• Testing foal IgG at 12 to 24 hours

• Introducing creep feed gradually

• Using a feed formulated for growing foals

• Avoiding free-choice grain

• Providing safe turnout

• Monitoring growth and limbs regularly

• Preparing the foal nutritionally before weaning

• Calling the vet early for weakness, diarrhoea, poor nursing, limb changes, or poor growth

AAEP notes that vaccinating the mare alone is not enough to protect the foal. Successful passive transfer through adequate colostrum intake and absorption must also occur. (AAEP)

That is the theme of foal nutrition generally.

The details matter.

Will My Foal Be Okay?

Most foals do very well when the mare is healthy, colostrum transfer is confirmed, growth is steady, and feeding changes are controlled.

The outlook is much better when problems are caught early. A foal with low IgG, poor nursing, diarrhoea, sepsis, limb deviation, rapid growth, or poor weight gain needs early intervention, not a wait-and-see approach.

A small adjustment at the right time can prevent a much larger problem later.

The main thing to remember is this:

Foals should grow steadily, not explosively.

FAQs

When should a foal start eating creep feed?

Many foals start nibbling small amounts of feed in the first month, but creep feeding becomes more important as milk alone becomes less able to meet growth needs, especially by around 3 to 4 months or when weaning is approaching. The amount should be measured and adjusted to the foal’s growth, body condition, and forage intake.

How soon should a newborn foal nurse?

A foal should start nursing within about 2 hours of birth. If the foal has not nursed by 2 to 3 hours, call your vet. Early colostrum intake is critical for immunity.

Should foals have free-choice grain?

No. Foals should not be allowed unlimited grain. Overfeeding can cause excessive or erratic growth and may increase developmental orthopaedic risk.

What are signs a foal is not getting enough milk?

Warning signs include frequent unsuccessful nursing attempts, a full mare udder, weakness, dullness, crying, poor weight gain, dehydration, reduced urination, and the foal trying to eat large amounts of the mare’s feed early. These signs need veterinary assessment.

When should a foal be weaned?

Many managed foals are weaned between 4 and 6 months, but timing depends on the mare, foal, farm setup, health, growth, and whether the foal is eating solid feed confidently. Weaning before the foal is nutritionally ready can increase stress and feeding problems.

Final Thoughts

Foal nutrition is not about making the biggest foal in the paddock.

It is about building a healthy horse.

That starts with the mare, then colostrum, then milk, then forage, then carefully measured creep feed, then a controlled weaning transition. Every stage matters, and rushing one part can create problems in the next.

The best foal feeding plan is steady, balanced, and boring in all the right ways.

Confirm colostrum transfer. Feed the mare properly. Avoid free-choice grain. Watch growth and limbs closely. Use turnout wisely. Prepare for weaning before the day arrives.

A foal’s future soundness starts long before it ever carries a saddle.

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If you are unsure whether your foal is nursing enough, growing correctly, ready for creep feed, safe to wean, or showing early signs of illness or limb problems, ASK A VET™ can help you work through the warning signs and decide what needs veterinary attention.