Horse Side Vet Guide ®

Equine Health Resource

Ate Poisonous Substance or Toxin, Witnessed

Code Red - Call Your Vet Immediately, Even Outside Business Hours

Code Red - Call Your Vet Immediately, Even Outside Business Hours

  • Even if the horse seems normal, it is best to start the conversation.

You know that your horse has just ingested a poisonous substance, or a substance that you believe may be poisonous to horses. The safest thing to do is contact your vet immediately, and then place your horse in a stall and let them rest quietly until your vet arrives. Unlike many other animals, horses cannot vomit so drugs that induce vomiting (emetics) are useless in this circumstance.

If possible to do without being bitten, pull any remaining material out of your horse’s mouth, and wash your hands. If appropriate, find the packaging for the poison, because your vet may ask you about the ingredients. Specific toxins may have specific treatments and antidotes. Your vet will also ask how much of the material you think your horse consumed.

Generally, horses are very good at avoiding toxic substances because they tend to be bitter and unpalatable. Horses usually do not consume enough of these substances to cause toxicity, especially if they have plenty of feed available. However, some toxic substances can cause harmful effects in just a few mouthfuls.

If your vet is able to examine your horse promptly (within an hour of eating the toxic substance), they may try to remove some of it from your horse’s stomach with a nasogastric tube. They may also give your horse laxatives such as mineral oil to reduce the absorption of toxins. Further treatments will depend on the toxin ingested and the specifics of the situation.

You can also call the American Society for the Prevention of Cruelty to Animals (ASPCA) 24-Hour Animal Poison Control Center hotline at 888-426-4435. A consultation fee may apply.

What Not To Do

Do not try to induce vomiting (which horses cannot do) or perform any other self-help involving the extraction of the toxic material from the horse. You may do more harm than good.

Author: Doug Thal DVM Dipl. ABVP


We're not around right now. But you can send us an email and we'll get back to you, asap.