Can Rabbits Eat Green Onions? Here’s why not.

Categorized as Bunny Diet Tagged

Last Updated on February 20, 2023 by Marjon Ramos

Green onions should not be fed to rabbits because it has an immunosuppressive effect (weakens immune system) on them.

It’s also possible for a rabbit to develop hemolytic anemia (a decrease in red blood cells) or an anaphylactic reaction (a severe life-threatening allergic reaction) when fed green onions.

Now that I’ve given you the gist of the article, read on as I explain in more detail why rabbits can’t eat green onions:

Would rabbits intentionally eat green onions?

A wild rabbit eating a wild green onion

Yes, your rabbits would definitely eat green onions if they ever get a chance. In fact, I’ve personally seen my rabbit (Freya) ate some green onions I copped up.

There’s also a lot of reports from rabbit owners online about rabbits liking green onions:

 She’s taken a particular liking to them and refuses her carrot and carrot tops and goes to the onions instead…


So be careful that you don’t let your rabbit get close to one and store them somewhere your rabbits can’t reach.

Risk of overfeeding green onions to rabbits.

A bowl of chopped green onions

Green onions has long been know to have negative effects on other animals (dogs, cats, etc…).

While your rabbit would need to eat a lot of green onions for it to have a negative effects on their health, there’s still some serious risk when doings so.

Here are some of the risks associated with feeding your rabbits large amounts of green onions:

Hemolytic anemia

Green onions contains disulfides and thiosulphates, which can lead to hemolytic anemia on large doses.

Hemolytic anemia is a condition that occurs when your rabbit’s red blood cells are being destroyed faster than they can be replaced.

The signs that your rabbit might be suffering from hemolytic anemia can be one or more of the following:

  • Lethargy
  • Decreased appetite
  • Decreased exercise tolerance

If you notice any of the following symptoms from your rabbit after accidentally eating green onions, bring them to a rabbit-savvy veterinarian for a proper diagnosis.

Anaphylactic reaction

Anaphylactic reaction or a severe life-threatening allergic reaction in rabbits is also possible if they accidentally ate green onions.

Not all rabbits would experience allergic reaction when fed green onions. But, its been reported to happen in some rabbits.

Here are the signs that your rabbit might be having an allergic reaction to green onions:

  • Difficulty breathing
  • Swelling of the face or respiratory tract
  • Progressing shock


Some experiments have also been conducted by inducing large amounts of garlic extract on rabbits as test subjects.

What they found was that rabbits needed 3200 mg/kg for it to be fatal.

Signs of acute LD50 toxicity in rabbits include loss of appetite and partial paralysis.

While its true that garlic is the one that’s used in the experiment, both garlic and green onions contains disulfides and thiosulphates.

You can read more about the mentioned experiment here.


Diarrhea in rabbits is often caused by the wrong diet or when the diet is changed too fast. 

Feeding your rabbit large amounts of green onions would check those two boxes I mentioned.

I just want to add that diarrhea (a life-threatening condition) is often confused with uneaten cecotropes (which can be fixed by the right diet) in rabbits.

You can tell the difference between uneaten cecotropes and diarrhea by looking at your rabbit’s poop.

Rabbits that only have uneaten cecotropes would still produce solid poop pellets, while diarrhea would not.

Uneaten cecotropes

Soft uneaten cecotropes are also possible when rabbits are eating large amounts of green onions instead of hay.

This could lead to softer cecotropes due to the lack of fiber in your rabbit’s diet.

Healthy alternative to green onions.

Here’s a list of vegetables and leafy greens that are a great alternative to green onions:

FAQ (Frequently Asked Questions)

Should you panic if your rabbit eats a little bit of green onions?

While it’s true that green onions is toxic to rabbits, the amount of green onions your rabbit would need to eat to experience any adverse effects is large.

Observe your rabbit for any additional symptoms like changes in their behavior, poop, urine, or signs of allergic reactions like swelling.

You can also call the poison control hotline if you suspect or are worried that your rabbit is experiencing intoxication.

What to do if your rabbit ate green onions?

Observe your rabbit’s behavior and poop for any changes.

You should also feed them a lot of hay.

The extra fiber would help clear out what’s in their gut.

If you notice any changes in their poop or behavior, consult a veterinarian immediately.


Green onions should never be fed to rabbits intentionally because it could lead to toxicity, allergic reactions, anemia, and weakened immune systems.

While it’s true that green onions is toxic to rabbits, your rabbit would need to eat a lot of green onions before experiencing any adverse effects.

If you suspect or are worried that your rabbit might be suffering from toxicity, call your veterinarian or your animal poison control hotline.

Cite this article:

Bunny Horde (February 22, 2024) Can Rabbits Eat Green Onions? Here’s why not.. Retrieved from
"Can Rabbits Eat Green Onions? Here’s why not.." Bunny Horde - February 22, 2024,

Read our latest posts

By Marjon Ramos

I’ve loved and cared for rabbits since I was 9 years old, and I’m here to share my passion for rabbits. My objective is to help rabbit owners give their rabbits the best life possible.