Poisoning of Horses by Plants

[Bob Gould]

Horses will usually avoid eating poisonous plants (they don't taste very good) as long as there is an abundant supply of good quality hay or pasture available. However, faced with no pasture or hay, a horse might decide to sample one of the poisonous weeds still left standing in the field.

For more info go to: http://www.gov.on.ca/OMAFRA/english/livestock/horses/facts/poison.htm