{"id":"leek","common_names":["Leek","Elephant Garlic","Garden Leek"],"scientific_name":"Allium ampeloprasum","urls":{"plant":"https://verdapaw.com/plants/leek","cats":"https://verdapaw.com/plants/leek/cats","dogs":"https://verdapaw.com/plants/leek/dogs","data":"https://verdapaw.com/plants/leek/data.json"},"toxicity":{"cat":{"severity":3,"grade":"S3 Toxic","verdict_sentence":"Leek (Allium ampeloprasum) is toxic to cats (S3 Toxic): the ASPCA lists N-propyl disulfide, with vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, and panting. Pet Poison Helpline says leeks are poisonous to dogs and cats, and poisonous doses damage red blood cells and cause gastrointestinal distress.","toxic_principles":["N-propyl disulfide"],"toxic_parts":[],"symptoms":[{"sign":"Vomiting","onset":"not specified in source"},{"sign":"Breakdown of red blood cells (hemolytic anemia, Heinz body anemia)","onset":"not specified in source"},{"sign":"Blood in urine","onset":"not specified in source"},{"sign":"Weakness","onset":"not specified in source"},{"sign":"High heart rate","onset":"not specified in source"},{"sign":"Panting","onset":"not specified in source"},{"sign":"Anemia after a poisonous dose","onset":"not specified in source"},{"sign":"Gastrointestinal distress, with nausea, vomiting, and diarrhea, after a poisonous dose","onset":"not specified in source"}],"sources":[{"url":"https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/leek","name":"ASPCA","accessed_at":"2026-11-03"},{"url":"https://www.petpoisonhelpline.com/poison/leeks/","name":"PPH","accessed_at":"2026-11-03"}],"reviewed_by":"auto","reviewed_at":"2026-11-03"},"dog":{"severity":3,"grade":"S3 Toxic","verdict_sentence":"Leek (Allium ampeloprasum) is toxic to dogs (S3 Toxic): the ASPCA lists N-propyl disulfide, with vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, and panting. Pet Poison Helpline says leeks are poisonous to dogs and cats, and poisonous doses damage red blood cells and cause gastrointestinal distress.","toxic_principles":["N-propyl disulfide"],"toxic_parts":[],"symptoms":[{"sign":"Vomiting","onset":"not specified in source"},{"sign":"Breakdown of red blood cells (hemolytic anemia, Heinz body anemia)","onset":"not specified in source"},{"sign":"Blood in urine","onset":"not specified in source"},{"sign":"Weakness","onset":"not specified in source"},{"sign":"High heart rate","onset":"not specified in source"},{"sign":"Panting","onset":"not specified in source"},{"sign":"Anemia after a poisonous dose","onset":"not specified in source"},{"sign":"Gastrointestinal distress, with nausea, vomiting, and diarrhea, after a poisonous dose","onset":"not specified in source"}],"sources":[{"url":"https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/leek","name":"ASPCA","accessed_at":"2026-11-03"},{"url":"https://www.petpoisonhelpline.com/poison/leeks/","name":"PPH","accessed_at":"2026-11-03"}],"reviewed_by":"auto","reviewed_at":"2026-11-03"}},"license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/","terms":"Free to reuse with attribution to Verdapaw and a link to the plant page."},"cite_as":"Verdapaw Plant × Pet Safety Index, verdapaw.com/plants/leek, reviewed 2026-11-03"}