Can they eat it? / Corn (whole or cracked)
Can horses eat corn (whole or cracked)?
Careful. Energy-dense and a mould risk.
Fine as part of a formulated feed; plain corn is easy to overfeed and must be clean and dry (see moldy corn). Not for easy keepers.
Weight gain; colic or worse if mouldy.
Why
Corn is very rich in starch and calories, and most of it digests in the small intestine. A large load can overwhelm that process, pushing starch into the hindgut, where fermentation can cause gas, acidity and colic. Whole or cracked corn also carries a real mould risk: when it is damp or stored poorly, fungi can produce mycotoxins such as fumonisins, which harm the liver and nervous system. Clean, dry corn in small amounts is manageable; damp or dusty corn is not.
How much is too much
For a 1,000 lb horse, a small scoop of corn is a few pounds at most, and that should be a minor part of the daily ration, not the main feed. A bucket or large handful at one feeding is too much for the digestive system. Ponies, miniatures and metabolic horses should get none or only a tiny taste, since a small amount of starch and calories can add weight quickly. Check the bag and feed only fresh, dry grain.
Horses
For full-size horses in work, corn can supply extra energy, but it works best as a measured part of a balanced grain ration. Split it across several meals rather than one large feeding, and keep it strictly dry and free of dust or musty smell. Horses at pasture rarely need corn, since good forage meets most needs. If you add it, tell your vet or nutritionist so the total starch load stays in a safe range.
Ponies and easy keepers
Ponies and easy keepers should avoid corn. Their bodies store extra calories efficiently, and corn's energy density can lead to weight gain, laminitis risk and insulin problems. Seniors with poor teeth may also struggle with whole kernels. If a treat is needed, offer a small piece of carrot or a few pieces of safe fruit instead. Ask your vet before feeding any starchy grain to a pony or metabolic horse.
Safe alternatives
Offer a small handful of chopped carrot, a few apple slices with the core removed, or a measured scoop of a commercial feed formulated for your horse's workload. Serve treats in small pieces so they are easy to chew and easy to digest. Always introduce new foods gradually and keep fresh water available.
Questions people ask
Can horses eat corn in hay?
Corn in hay is not a normal part of good forage. Bits of corn stalk or grain can be a sign of poor quality or contamination. Check any hay for mould, dust or foreign material before feeding.
Can horses eat corn after frost?
Frost-damaged corn can grow mould or carry toxins, so do not feed it. Corn stored in damp conditions after a cold spell is risky. Discard any suspect grain and buy fresh, dry feed.
How much corn can a horse eat a day?
A full-size horse in work can take a few pounds of grain split across meals, with corn as one component. Ponies and easy keepers should have little or none. Ask your vet for a plan matched to your horse.
Careful for horses means: fine in a small amount, prepared as described, and not for every pet; the details say when to skip it.
General information from veterinary guidance, not a diagnosis. If you are worried, call your vet or a pet poison line: ASPCA Animal Poison Control (888) 426-4435. Charges may apply.
Written by Hoofdeck editors · updated Nov 13, 2026 · from ASPCA Animal Poison Control, Merck Veterinary Manual and university extension guidance.