Can they eat it? / Pet food (dog or cat kibble)
Can horses eat pet food (dog or cat kibble)?
No. Meat-based and sometimes medicated; not for a horse.
A stolen mouthful will not hurt, but horses are herbivores and some pet foods contain things banned in competition or unsafe in quantity. Keep pet bowls out of the barn aisle.
Colic or loose manure after a lot.
Why it is dangerous
Dog and cat foods are built on meat, fat and animal protein, which horses digest poorly because their gut is designed for fibre and forage. Eating it can upset the hindgut, causing colic or loose manure. Some pet foods also contain medicated additives or supplements that are not meant for equines and can be banned in competition. A stolen mouthful is unlikely to cause real harm, but it should not become a habit.
How much is too much
A lick or a stray kibble is unlikely to matter for a 1,000 lb horse. A handful or more is a different story, and a full bowl or a bag is a real risk. Ponies, miniatures and metabolic horses are more sensitive to any unexpected feed, so even a modest amount deserves a call to your vet. If your horse eats a meaningful amount, contact your veterinarian promptly.
Horses
For horses in work or at pasture, keep pet bowls out of the barn aisle and away from feed rooms. Store dog and cat food in sealed bins, and avoid tossing scraps into paddocks. Barn cats and visiting dogs can leave food where horses roam, so check stalls and grooming areas each day. Competition rules often ban medicated feed additives, so be extra careful about anything that could end up in a grain bucket.
Ponies and easy keepers
Ponies, miniatures, seniors and easy keepers are more vulnerable to digestive upset and to any extra calories or sugar in pet food. Keep these horses away from pet food entirely, and watch for changes in manure or appetite after any mix-up. Insulin-resistant or laminitis-prone horses should not get unexpected treats, so report any unplanned intake to your vet, who can advise on monitoring.
Safe alternatives
Offer a small handful of plain alfalfa cubes or a few sliced carrots as a safe treat, given in moderation. Chopped apples without seeds also work well. For enrichment, try a lick ball or a few handfuls of grass hay in a slow feeder. These options keep your horse happy without the risks of pet food.
Questions people ask
What if my horse ate some dog food in the paddock?
Watch for colic signs and loose manure over the next day. Call your veterinarian if your horse seems off, or if the amount was more than a mouthful.
Is cat food worse for horses than dog food?
Both are unsuitable for horses. Cat food tends to be richer in fat and protein, so it can be more upsetting, and either can contain additives you should avoid.
Can a horse show ban over eating pet food?
Possibly, if the food contains a prohibited substance. Check your sanctioning body's rules and keep pet food well away from competition feed.
Toxic for horses means: do not give it; if they ate it, call your vet or a poison line.
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.