Can Rabbits Eat Onions? : Things You Should Know Before You Give Them To Your Rabbit

Can rabbits eat onions? Rabbits are supposed to be herbivores, which means they can't eat meat products. While there are many vegetables that are safe for rabbits to eat,

Can rabbits eat onions? Rabbits are supposed to be herbivores, which means they can’t eat meat products. While there are many vegetables that are safe for rabbits to eat, onions are not one of them. Rabbits shouldn’t consume any food with onion in it.

One of the most popular and much-loved household pets has been rabbits over the past few years has been rabbits, and to feed them, you will want to know everything there is to know about rabbits and the food they eat.

I’m sure the thought has crossed your mind a time or two. “Can rabbits eat onions”? Who hasn’t said that in their life at some point? As a general rule, onions (and other things) aren’t suitable for rabbits. But you still might be interested in knowing more about can rabbits eat onions and what happens if they do. 

Today, I wanted to share what I learned while researching this topic with you, so you’re better able to make informed decisions moving forward with your little bunny.

In this blog, you will find information on Are onions good or bad for rabbits? If you need to know how to give onions to the Rabbit or stop the Rabbit from eating onions, then this blog is for you.

Table of Contents

  1. What Are Onions?
  2. Nutritional Facts of Onion
  3. Can Rabbits Eat Onions?
  4. Are Onions Good for Rabbits?
  5. Can You Give Them a Little Bit at a Time?
  6. What Is the Danger of Onion to Rabbits?
  7. How Can Onions Be Toxic for a Rabbit?
  8. Onion Poisoning Symptoms to Look Out For
  9. Conclusion

What Are Onions?

Brown onions on a wooden table

Onions are members of the allium family, which also includes shallots, leeks, and Garlic. They are a hardy, easy-to-grow bulb popular in many cooking styles, particularly in Asian and Mediterranean recipes. They are also known as bulb onions, common onions, and garden onions. The majority of onions grown today are yellow or red in color, but they can range from white to purple.

While they have a wonderfully rich flavor, they also have a distinct odor that some people enjoy and others find offensive. It’s that odor that seems to put people off.

Many people think they will be fine giving onions to their bunny, but they are unaware of the dangers that onions can pose to their pet.

Nutritional Facts of Onion

Onions are a superfood that is low in calories and high in nutrients. They are a good source of fibre, vitamins A, C, and B6, and folic acid. They also contain antioxidants and phytochemicals that have been linked to a reduced risk of cancer and other chronic diseases. Onions are a versatile ingredient that can be used in a variety of dishes, and they can be eaten raw, cooked, or pickled.

So, although onions are good for you, you don’t want to give them to your pet rabbits. Onions contain the toxin thiosulfate, which is very harmful to rabbits. It causes hemolytic anemia, which affects the ability of red blood cells to carry oxygen to the body. Rabbits that eat onions experience weakness, lethargy, loss of appetite, and difficulty breathing. Rabbits that eat onions can also experience gastrointestinal irritation and a loss of potassium and sodium. Rabbits that eat onions are at risk for death.

Common Nutrients That Onions Contain:

  • vitamin A
  • vitamin C
  • calcium
  • potassium
  • iron
  • magnesium
  • phosphorus
  • folate
  • manganese
  • zinc

Can Rabbits Eat Onions?

White onions

No, Rabbits should not eat onions. Onions can cause serious harm to rabbits and should be avoided at all costs. Onions contain a chemical called thiosulphate. This chemical prevents red blood cells from absorbing oxygen. Red blood cells can’t carry oxygen to organs and muscles without oxygen. This can lead to damage and failure of the liver and kidneys and basically every other organ in the body. Since rabbits are relatively small animals, even a small number of onions can be toxic.

Are Onions Good for Rabbits?

Are onions good for rabbits? It’s a simple question. Yet, the answer is not so simple. Onions contain thiosulphate and disulfide, which are toxic to rabbits. While this is true, there are some important things that you need to know before you can confidently answer the question, Are onions good for rabbits?

Onions are not typically considered to be good for rabbits. While a small amount of onion is not likely to cause serious harm, it is best to avoid feeding onions to rabbits. Onions can cause an upset stomach and may lead to digestive problems. If you must feed your rabbit onions, be sure to do so in moderation.

Related Posts  Can Rabbits Eat Spinach?

Green Onions

Rabbits can eat some part of fruits or vegetables. How about green onions? Are they good for our furry hopping friends, or are they bad? Green onions are just onions that aren’t yet grown. They have the same properties as mature onions, so you shouldn’t feed them to your Rabbit.

Red Onions

Red onions contain more flavor than regular onions. They are often used as a substitute for yellow onions. They are also typically sweeter and less pungent than yellow onions.

However, there’s not much difference between red and yellow onions in terms of your Rabbit’s health. The onion family comprises members like Garlic, shallots, leeks, and scallions. All of these vegetables are toxic to your Rabbit, so it’s essential to be aware of the signs of onion poisoning. Each type of onion has a different level of toxicity.

Can You Give Them a Little Bit at a Time?

 Rabbits are herbivores and can eat various fresh greens, fruits, and vegetables. However, you should avoid giving your rabbit onions as they may cause digestive problems.

What Is the Danger of Onion to Rabbits?

Onions contain a compound called thiosulphate, which can be toxic to rabbits if they eat too much of it. Symptoms of onion toxicity include gastrointestinal upset, anemia, and difficulty breathing. If your Rabbit eats a lot of onions, or even just a tiny amount of onion skins, they could become very ill. If you suspect your Rabbit has eaten onions, contact your vet immediately.

How Can Onions Be Toxic for a Rabbit?

Onions are toxic to rabbits because they contain a substance called n-propyl disulfide (n-propylthiosulfate), which is toxic to most mammals. It is commonly used as a pesticide and insecticide, and it is also used in rat poison. Most people know that onions are toxic to dogs, but they don’t know that they are also toxic to many animals, including rabbits.

Onions can be toxic for rabbits if they eat too much of them. Onions contain a substance called thiosulphate, which can be poisonous to rabbits. If a rabbit eats too much onion, the thiosulphate can build up in its system and cause problems. 

Onion Poisoning Symptoms to Look Out For

Onions on a wooden surface

Symptoms of onion toxicity in rabbits include lethargy, loss of appetite, vomiting, and diarrhea. If your Rabbit shows any of these symptoms, immediately take them to the vet.

Some Other Harmful Foods for Rabbits

  • Avocado
  • Grapes and raisins
  • Iceberg Lettuce
  • Chocolate
  • Potatoes

List of Some Healthy Food You Can Give to Rabbit

  • carrot 
  • beets
  • basil
  • spinach
  • cucumber
  • tomato
  • green beans
  • pumpkin
  • zucchini
  • broccoli


Can rabbits eat onions? No.

It is good to give treats to your Rabbit with many good foods, but onions should never be given.

Any part of onions, no matter green onions, can be very harmful to your Rabbit.

It can cause serious health issues like blood-related, Stomach problems, and many others. In some severe cases, it can cause death.

There are a lot of other food treats for your Rabbit. So, be conscious about your rabbits’ health and save them from the harmful effects of onions and other toxic foods.

Thank you for reading.


Are Onions Safe For Rabbits?

No, Onions are harmful to rabbits. They can cause serious problems. Never give your Rabbit a bit of onion.

Can Onions Make My Rabbit Sick?

Yes, Onions can cause serious health issues like hemolytic anemia and anaphylactic shock. These are deadly if treatment is not started immediately. Call your vet immediately if your Rabbit accidentally ate onions.

Can Rabbits Have Green Onions?

No, Green onions are also toxic as it is yet grown onion, and it has the same properties as fully grown onion. Don’t give green onions to your Rabbit.

Can Rabbits Have Red Onions?

No, Any type of onion can be hazardous to your Rabbit. All types of onions have the same toxic properties. So, don’t give Red Onions to your Rabbit.

Are Sweet Onions OK For Rabbits?

Absolutely not! Sweet onions are as toxic as other types of onions.

Can Rabbits Have Shallots?

No, Shallots are also Toxic like onions, and it is from the same family. So, don’t give shallots to your Rabbit.

Can I Give Rabbit Garlic?

No, Garlic is also from the same family and is as much toxic as onion, so be careful of giving Garlic to your Rabbit.

Related Post: Can Rabbits Eat Leeks? – The Complete Guide
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