How can you tell if your horse has eaten a poisonous plant?

Signs of poisoning include:

1. Colic
2. Muscle spasms
3. Tremors (shaking)
4. Staggering
5. Difficulty swallowing
6. Drooling
7. Irregular heart beat (slower or faster than normal)
8. Confusion
9. Unusual spookiness or panicking for no apparent reason
10. Urinating more than usual or the urine is an abnormal color
    

A horse may exhibit just one or many of these symptoms. They don't have to show all signs in order to have been poisoned.

If you suspect your horse has been poisoned, do not delay! Call your vet immediately.