Leeks are toxic to dogs — Allium family like onion and garlic. They cause hemolytic anemia. Often found in soups and stews. Seek vet care if ingested.

How much leek can I give my dog?

Leek is not recommended for dogs.

Can Dogs Eat Leek?

Q: Is leek toxic to dogs?

Yes, Leek is toxic to dogs. Leeks are in the Allium family and contain the same toxic organosulfoxides that damage red blood cells in dogs. They are approximately 1/4 as potent as onion by weight but are still toxic and should never be fed to dogs. Leeks commonly appear in soups, stews, and stock. If your dog ingests leek-containing food, monitor for signs of anemia (pale gums, lethargy, rapid breathing) over the following 1–4 days. As with all Allium toxicity, the damage is cumulative — repeated small exposures can eventually cause clinical anemia.

Short Answer: NO (Toxic)☠️ Toxic

Quick Facts

Safety Level

☠️ Toxic

Detailed Information

Leeks are in the Allium family and contain the same toxic organosulfoxides that damage red blood cells in dogs. They are approximately 1/4 as potent as onion by weight but are still toxic and should never be fed to dogs. Leeks commonly appear in soups, stews, and stock. If your dog ingests leek-containing food, monitor for signs of anemia (pale gums, lethargy, rapid breathing) over the following 1–4 days. As with all Allium toxicity, the damage is cumulative — repeated small exposures can eventually cause clinical anemia.

⚠️ Warnings & Preparation

⚠️Same Allium family toxicity as onion and garlic
⚠️Often found in soups and stews
⚠️About 1/4 as toxic as onion but still dangerous

Symptoms to Watch For

If ingested, watch for:

Hemolytic anemiaGI upsetPale gumsLethargy

Onset time: 1–4 days

Looking for Safe Treats?

🛒 Leek-flavored dog treats 🛒 Leek dog treats 🛒 Carrot dog treats 🛒 Greenies dental chews

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Data Accuracy

All food safety data is sourced from peer-reviewed veterinary references and established animal health organizations. While we strive for accuracy, new research may change safety classifications. Last reviewed: August 2026. Report an error: support@pawscale.com

📎 Sources

https://www.aspca.org/pet-care/aspca-poison-control/people-foods-avoid-feeding-your-pets

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Disclaimer

This information is based on data from ASPCA, AKC, and Merck Veterinary Manual. Individual dogs may have allergies, sensitivities, or health conditions that affect food safety. The serving guidelines are general recommendations — your veterinarian can provide personalized advice based on your dog's specific needs. PawScale is not liable for any adverse reactions resulting from the use of this information.

Data sources: Source 1. Last reviewed: August 2026. Report an error: support@pawscale.com

Medical Disclaimer

The information on PawScale is for educational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult your veterinarian before making changes to your dog's diet. If you suspect your dog has ingested a toxic substance, contact your veterinarian or the ASPCA Animal Poison Control Center (888) 426-4435 immediately.