Last reviewed: August 2026

Can Dogs Eat Leeks?

ToxicSame Family as Onions

No. Leeks are part of the Allium family, along with onions and garlic, and carry the same toxicity risk — a cumulative cause of anaemia in dogs.

Why

Leeks contain the same organosulfur compounds as onions and garlic that damage red blood cells through oxidative stress, leading to haemolytic anaemia. See our onions & garlic page for the full mechanism — the same guidance applies here.

Symptoms to watch for

Timing	What to expect
2–5 days	Lethargy, pale gums, dark urine — delayed signs of Allium-related anaemia

What to do if your dog ate this

Treat leeks with the same caution as onions and garlic — avoid entirely
Check soup, stock, and casserole ingredients for leek content before sharing with a dog
Watch for delayed anaemia signs (pale gums, lethargy, dark urine) over several days if a significant amount was eaten

🚨 If this happens

Contact your nearest 24-hour emergency vet clinic immediately, or your regular vet's after-hours line. Bring packaging if you have it.

ASPCA Animal Poison Control (US, reference only): +1-888-426-4435 — typically charges a consultation fee for non-US callers.

Sources

General veterinary toxicology consensus, cross-referenced against the Merck Veterinary Manual and ASPCA Animal Poison Control Center food hazard references. See How We Source This for our methodology.

This page is general educational information, not a substitute for veterinary advice.