Can Dogs Eat Green Onions? 

Have you ever found yourself ready to make a delicious dinner for your pup, only to later ask yourself the all-too-familiar question: can my dog safely eat this? It’s always important to think about foods you are introducing into your pup’s diet, particularly elements of human food that their body might not be used to. Foods such as green onions are an especially tricky ingredient due to their strong flavor and aroma. Read below to explore the potential risks of feeding green onions to our canine companions, so you can make informed decisions when feeding your pet. 

How Onions Pose Serious Dangers to Dogs 

Onions are dangerous to dogs and should be strictly avoided. These pungent vegetables, whether raw, cooked, dehydrated, or powdered, can cause severe health issues in dogs. Onions have the potential to damage a dog’s red blood cells, specifically Heinz body formation, which can result in anemia. It is important to note that onions can be present in many food items that dogs might come across, including soups, gravies, sauces, and even some baby food. Dog owners must be cautious and thoroughly read labels to ensure that their furry friends are not exposed to any form of onions. Immediate veterinary attention is crucial if a dog ingests onions to prevent further complications. 

Clinical Signs of Onion Poisoning 

If you suspect that your pet has consumed onions, you can smell their breath to confirm. Eating a large amount of onion can lead to severe poisoning in dogs. Potential symptoms of poisoning include: 

  • Lethargy 
  • Pale mucus membranes 
  • Elevated respiratory rate 
  • Elevated heart rate 
  • Vomiting 
  • Reduced appetite 

In rare cases, hypoglycemia or low blood sugar can occur. This is a potentially life-threatening condition and needs veterinary intervention immediately. 


If you suspect that your dog has eaten onions or onion powder, call your veterinarian and Pet Poison Helpline at (855) 764-7661 for life-saving advice. Take your pup to the veterinary clinic so they can receive treatment. Your veterinarian may induce vomiting and administer activated charcoal to decontaminate the system. If your dog is experiencing severe anemia, blood transfusion will be needed. With early intervention and appropriate care, your pup should be able to make a full recovery.