Can cats eat green onions?

In this brief discussion, we’ll answer the question, “Can cats eat green onions?” We will also discuss if green onions can kill cats, the symptoms of green onion poisoning and what to do if cats eat green onions.

Can cats eat green onions?

No, cats cannot eat green onions. Green onions belong to the allium family which is considered poisonous for both cats and dogs. Disulfides and thiosulphates, which are found in green onions, are considered poisonous to cats.

Heinz body anaemia, methemoglobinemia, and hemolytic anaemia are all signs of damaged red blood cells and are all brought on by eating green onions. 

In essence, the red blood cells moving through the body of your pet can become extremely fragile due to the substances in onions.

Do cats like green onions?

No. Thankfully, the majority of cats have zero interest in eating green onions. They contain nothing that would draw the attention of the majority of felines, and they won’t even chase them out of curiosity to learn what you’re up to.

They don’t smell or taste very appetizing to cats, and if given the choice between biting on something they instinctively know is nasty or chasing after grass, the grass will always win.

Cats typically consume green onions as a byproduct of ingesting other foods including pizza, tomato sauce, chive bread, baked potato toppings, and others. However, most cats won’t attack green onions when left alone, which is fortunate given how deadly they are.

Can green onions kill my cat?

Yes, Your cat can definitely die from eating green onions, and it doesn’t take much to get a cat terribly ill and have health issues. The biggest issue with alliums, which include garlic, scallions, and any type of onion, is that they harm your cats’ red blood cells. 

Anaemia is caused by damage to the red blood cells, and the symptoms don’t always appear straight away. Additionally, because cats are such little creatures, a small amount is all that is required to make them ill. 

The thiosulphate present in green onions is the cause of this phenomenon. As a result, the red blood cells’ capacity to carry oxygen declines, leading to anaemic symptoms.

What are the symptoms of green onion poisoning?

Chives and green onions have the ability to relax the heart muscles and widen blood vessels, which might result in low blood pressure and other heart issues. The following are signs of green onion poisoning:

  • Drooling
  • Mouth irritation
  • Nausea
  • Uncomfortable stomach
  • Diarrhoea
  • Pale gums
  • Lethargy
  • Skin Discoloration
  • Weakness
  • Collapse
  • Urine that is red or orange-coloured
  • Panting
  • Incoordination

Don’t assume you’re in the clear if twenty-four hours have passed after a cat ate some onion and nothing has happened because it might take many days for these symptoms to manifest.

Can cats eat cooked green onions?

The answer is no. Cooked green onions may even be more harmful than uncooked onions. Fresh onions may be passed by your furry buddy, but cooked onions might catch her eye.

Especially if they contain something your pet truly adores. A steak with sauteed onions on the side, a hamburger with fried onions on top, or even lamb chops with caramelized onions on top… Who could refuse all that mouthwatering goodness?

Although it’s obvious that you can’t resist those meows of desperation, it’s your duty to watch out that your cat doesn’t consume something she shouldn’t. Despite what you may believe, sautéed onions still have an effect.

What to do if your cat eats green onions?

To provide your beloved buddy with the finest supportive care available, you’ll need to act quite soon. As previously said, if your cat consumes even a small quantity of green onions, she may suffer some rather severe consequences.

You can start to experience symptoms of onion poisoning initially. They might range from less significant signs like nausea, vomiting, diarrhoea, drooling, and pale gums to more severe ones like fast heartbeat, rapid breathing, and stomach discomfort.

Any leftover green onions from your cat’s mouth should be removed (and out of her reach). Find out how many green onions she has already consumed, what kind (fresh, cooked, or powdered), and any other relevant details.

Get in touch with your vet right away, give him the information he needs, and keep him updated on your cat’s condition. If her condition worsens, you might also need to transport her to the closest emergency animal hospital.

In any case, always adhere to your veterinarian’s instructions to prevent any long-term effects on your pet. Don’t forget to keep your cat’s access to everything linked to green onions restricted. all the time!


We answered the question, “Can cats eat green onions?” We also discussed if green onions can kill cats, the symptoms of green onion poisoning and what to do if cats eat green onions.