List of plants poisonous to equines

Many plants are poisonous to equines; the species vary depending on location, climate, and grazing conditions.

In many cases, entire genera are poisonous to equines and include many species spread over several continents.

Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the wilted leaves of red maples), to cyanide poisoning (from the ingestion of plant matter from members of the genus Prunus) and other symptoms.

[4] Hungry or thirsty horses are more likely to eat poisonous plants, as are those pastured on overgrazed lands.

[5] Animals with mineral deficiencies due to poor diets will sometimes seek out poisonous plants.