Ingestion of toxic plants by herbivores
Utah State Extension
Behavioral Education for Human, ANimal, Vegetation & Ecosystem Management
Toxins are everywhere in nature. They occur in virtually all grasses, forbs, shrubs, and trees throughout the world (see Table 1). Even the vegetables we grow in our gardens contain low concentrations of toxins. Tomatoes and potatoes contain alkaloids, corn contains glucosinolates. Eating plants means dealing with toxins.
Burritt, Elizabeth A., "Ingestion of toxic plants by herbivores" (2013). Wildland Resources Faculty Publications. Paper 1542.