Can Dogs Eat Green Onion? The Risks And Dangers

Is green onion safe for dogs to eat? Find out in this comprehensive article, which covers the potential dangers of green onion for dogs and what to do if your dog has eaten it. Don't miss this important information for pet owners!
Can Dogs Eat green onions?

The short answer is no, dogs should not eat green onion. Green onions, also known as scallions or spring onions, are widely used in cooking due to their distinctive flavor and aroma. While they make a popular ingredient in many dishes, green onions are toxic to dogs. This article aims to explain what makes green onions toxic to dogs, the signs and symptoms of green onion toxicity, prevention methods, treatment options, and address some frequently asked questions.

What Makes Green Onions Toxic to Dogs?


Green onions contain a toxic compound called thiosulphate, which is also found in other members of the Allium family, such as garlic, leeks, chives, and shallots. All of these plants are toxic to dogs, making it essential to prevent your dogs from consuming them.

Hemolytic Anemia

When ingested by dogs, green onions can cause hemolytic anemia, a condition where the red blood cells are damaged and destroyed. Red blood cells are crucial to dogs' health, as they carry oxygen throughout their bodies. Green onions cause red blood cells to rupture, resulting in anemia and a range of associated health problems.

Signs and Symptoms of Green Onion Toxicity

A dog that has ingested green onions may exhibit a range of symptoms, including vomiting, diarrhea, abdominal pain, and lethargy. These symptoms can appear within a few hours to a couple of days after ingestion, depending on the amount consumed. The severity of the symptoms may range from mild to severe, based on the quantity of green onions ingested.

Prevention and Alternatives

To prevent your dog from ingesting green onions, be sure to keep them out of reach, properly store them, and be cautious when discarding food scraps. If you wish to flavor your dog's food, consider safe alternatives like rosemary or parsley. Always read dog food labels to ensure none of the mentioned ingredients are present, especially if you're trying a new product.

Treatment and Recovery

Initial Steps

If you discover that your dog has ingested green onions, stay calm and act quickly. It's essential to contact your veterinarian immediately for advice and guidance on the best course of action.

Veterinary Intervention

Your veterinarian may recommend inducing vomiting to remove the green onions from your dog's system or administering activated charcoal to bind any remaining toxins. In severe cases, hospitalization and supportive care, such as intravenous fluids, oxygen therapy, and blood transfusions, may be necessary. Your veterinarian will also monitor and provide follow-up care for your dog to ensure a smooth recovery.

Frequently Asked Questions

Can Dogs Eat Cooked Green Onions?

Cooking does not remove the toxicity of green onions. Therefore, it is crucial to avoid feeding cooked green onions to your dog, regardless of the preparation method.

Are Other Types of Onions Safe for Dogs?

No, all types of onions are toxic to dogs, including white, yellow, and red onions. It is important to avoid feeding your dog any onion variety to prevent health issues.

Can Green Onions Cause Long-Term Health Issues in Dogs?

While most dogs can recover from green onion toxicity, early intervention through veterinary care is crucial. Delaying or neglecting treatment could potentially result in long-term health issues or even death.


In conclusion, dogs must never eat green onions due to their toxic properties. If you suspect that your dog has ingested green onions, contact your veterinarian immediately for advice and treatment options. Be vigilant about your dog's diet and consult with a veterinarian if you have any concerns about your dog's health.

Medically Reviewed by Ivana Crnec, DVM

Ivana is a DVM with a specialty in domestic carnivores – dogs & cats. She is passionate about educating pet owners and raising awareness about pet health.

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