Can dogs eat spring onion, or is it harmful to them?

While preparing dinner earlier, a piece of spring onion fell to the floor, and before I could pick it up, my dog ate it. I know some ingredients can be harmful to dogs, so I'm concerned about whether the spring onion could cause any issues. Is it dangerous for him to have eaten this, or will he be okay?

Answer

Eating a small amount of spring onion is unlikely to cause harm to your dog, but onions are part of a group of plants that are toxic to dogs. It’s important to be cautious and monitor your dog for any signs of illness.

  • Spring onions belong to the allium family, which includes onions, garlic, chives, and leeks—all toxic to dogs.
  • Consuming large amounts of allium can damage red blood cells and cause hemolytic anemia in dogs.
  • Immediate symptoms of onion toxicity might include vomiting, diarrhea, lethargy, or lack of appetite.
  • If your dog ate only a small piece, he is likely to be okay but should be monitored for any symptoms.

The reason spring onions can be dangerous is that they contain compounds that can damage red blood cells and lead to a condition called hemolytic anemia. Keep an eye on your dog for the next few days, and if you notice any worrying symptoms such as change in energy levels, breathing difficulties or color changes in the gums, consider reaching out to a vet.

If you’re unsure or your pet’s symptoms are getting worse, book a consultation with a licensed vet at Dial A Vet for just $49 AUD.

Frequently Asked Questions

  • My dog ate a large amount of spring onions, what should I do?
    If your dog has eaten a large quantity of spring onions, contact your veterinarian immediately as there is a risk of onion toxicity.
  • How long after eating onions do symptoms appear in dogs?
    Symptoms of onion toxicity may appear immediately or can be delayed, sometimes showing up in a few days.
  • Can cooked or dehydrated onions also be harmful to dogs?
    Yes, both cooked and dehydrated onions contain toxic compounds and should be avoided in a dog’s diet.
  • Are all types of onions equally poisonous to dogs?
    Yes, all forms of onions, including spring onions, white onions, and red onions, are toxic to dogs.

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