Plants / Leek / dogs

Is Leek toxic to dogs?

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.

  • TOXINN-propyl disulfide
  • WHAT TO EXPECTVomiting; Breakdown of red blood cells (hemolytic anemia, Heinz body anemia); Blood in urine
  • CALL THE VETContact your vet promptly after ingestion. The ASPCA lists hemolytic anemia, blood in urine, and a high heart rate. Pet Poison Helpline ties the red-blood-cell damage to poisonous doses and does not give a number.
S0S1S2S3S4

Symptoms

SIGN
Vomiting
Breakdown of red blood cells (hemolytic anemia, Heinz body anemia)
Blood in urine
Weakness
High heart rate
Panting
Anemia after a poisonous dose
Gastrointestinal distress, with nausea, vomiting, and diarrhea, after a poisonous dose

If your dog just ate it

S3 PROTOCOL
1
Move the leek plant out of reach and contact your vet promptly after ingestion. The ASPCA lists hemolytic anemia, blood in urine, weakness, a high heart rate, and panting. Pet Poison Helpline says poisonous doses damage red blood cells and does not give a number. Bring a photo or piece of the plant.
2
When to call the vet: Contact your vet promptly after ingestion. The ASPCA lists hemolytic anemia, blood in urine, and a high heart rate. Pet Poison Helpline ties the red-blood-cell damage to poisonous doses and does not give a number.
Put it in my home →

Same floor look, minus the risk

3 floor plants graded S0 — non-toxic on record.

Care at a glance

Lightdirect
Waterevery 5–9 days
Humiditymedium
Difficulty●●○

FAQ

Is a leek plant toxic to dogs?

Yes, for Allium ampeloprasum: S3 Toxic. The ASPCA lists "N-propyl disulfide" and "Vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, panting". Pet Poison Helpline says cats and Japanese breeds of dogs, including Akita and Shiba Inu, are more sensitive. Contact your vet promptly after ingestion.

Which plant does this leek verdict cover?

Allium ampeloprasum. The ASPCA Leek entry gives that scientific name and lists Elephant Garlic. Pet Poison Helpline lists Garden Leek and does not print a scientific name on the Leeks page. The same Pet Poison Helpline sentence also names onion, garlic, and chives. This page does not grade those plants. Check the scientific name on the tag.

Do the sources give a poisonous dose for leeks?

No number is stated, and this page does not add one. Pet Poison Helpline says poisonous doses of Alliums damage red blood cells and cause gastrointestinal distress with nausea, vomiting, and diarrhea. The ASPCA lists hemolytic anemia, Heinz body anemia, blood in urine, weakness, high heart rate, and panting. Contact your vet promptly after ingestion.

Is a leek plant toxic to cats?

Yes, for Allium ampeloprasum: S3 Toxic. The ASPCA lists "N-propyl disulfide" and "Vomiting, breakdown of red blood cells (hemolytic anemia, Heinz body anemia), blood in urine, weakness, high heart rate, panting". Pet Poison Helpline says leeks are poisonous to cats and dogs. Contact your vet promptly after ingestion.

CITE THIS PAGE

Verdapaw Plant × Pet Safety Index, verdapaw.com/plants/leek, reviewed 2026-11-03