Are fragrant sweet peas poison to horses?

Fragrant sweet peas (Lathyrus odoratus) are considered toxic to horses. They contain compounds that can lead to a condition known as "lathyrism," which affects the nervous system and can cause weakness and other serious health issues. While not all horses may be affected, it's best to avoid allowing them access to this plant. If ingestion occurs, consult a veterinarian immediately for guidance.