Onion

dog unknowncat unknownhorse unknown

Clinical Signs: Vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, panting
Family: Liliaceae
Scientific Name: Allium cepa
Toxic Principles: N-propyl disulfide

Source: ASPCA Toxic and Non-Toxic Plants list (dogs), scraped 2026-07-14 from https://www.aspca.org/pet-care/animal-poison-control/dogs-plant-list · view original