Can Rabbits Eat Onions?

by Farmer Jack
Updated on

If you’re wondering whether onions are safe for rabbits to eat, the answer is unfortunately no. Onions are part of the allium family of plants, which also includes garlic leeks, and chives. Allium plants are poisonous to rabbits and can cause serious health problems if ingested.

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Though you may not think of it, onions are a part of the Allium species, just like garlic. For a long time, garlic has been used as a remedy for various medical conditions in rabbits, so you might be wondering if onions can have the same effect.

The jury is still out on whether or not onions are good for rabbits. Some people swear by feeding their rabbits small amounts of onion as a way to keep them healthy, while others believe that onions can cause more harm than good. If you do choose to feed your rabbit onion, it is important to only give them a very small amount, as too much onion can potentially be harmful.

Nutritional Value of Onions

Onions are a healthy and nutritious treat for rabbits. They are high in fiber and contain vitamins A, C, and E. However, onions also contain a compound called thiosulfate, which can be toxic to rabbits if they eat too much of it. To avoid this, only give your rabbit a small amount of onion as a treat, and make sure they have plenty of fresh hay and water available.

Health Benefits of Onions

Onions are not only a healthy treat for rabbits but can also offer many health benefits. Onions are a good source of vitamins A, C, and E as well as minerals such as magnesium, calcium, and potassium. They also contain quercetin, a powerful antioxidant that has been shown to have anti-inflammatory and anti-cancer properties.

risks associated with onions

While onions are not toxic to rabbits, they can cause gastrointestinal upset and may contribute to gas formation and bloating. Onions are best avoided as part of your rabbit’s diet.

How to Introduce Onions to Your Rabbit

Onions (Allium cepa) are a member of the Allium family, which also includes garlic, chives, and leeks. They are such a common ingredient in many dishes that we often forget that they are, in fact, plants. Like all plants, onions contain trace amounts of cyanide. This is not enough to be harmful to humans or dogs, but it can be deadly for rabbits. Onions must therefore be introduced into a rabbit’s diet with care.

The first step is to start with a small amount of onion. Cut the onion into very small pieces and mix it into your rabbit’s food so that they eat it gradually over the course of a few days. If you notice your rabbit becoming sick or showing any signs of illness, stop feeding them onions immediately and take them to the vet.

Assuming your rabbit does not have any adverse reaction to eating onions, you can slowly increase the amount you give them. You should never feed your rabbit more than 10% onion (by weight) in their diet as this can still be harmful to their health. When feeding onions to your rabbit, make sure they also have access to hay so that they can fulfill their daily fiber needs.

Onion Recipes for Rabbits

Onions are not recommended for rabbits. However, if you want to give your rabbit a treat, here are some recipes for onion-flavored dishes that your rabbit may enjoy.

1. Rabbit Onion tart – Preheat oven to 350 degrees F. Sauté onion in olive oil until softened. Add flour and mix well. Spread mixture into an 8-inch pie dish. Bake for 10 minutes. Add shredded rabbit and bake for an additional 10 minutes or until crust is golden brown.

2. Rabbit Onion Soup – In a pot, sauté onion in olive oil until softened. Add water and bring to a boil. Add shredded rabbit and simmer for 10 minutes. Serve soup with crusty bread or rolls.

3. Rabbit Onion Stew – In a pot, sauté onion in olive oil until softened. Add carrots potatoes and celery and mix well. Add water and bring to a boil. Add shredded rabbit and simmer for 20 minutes or until vegetables are tender. Serve stew with crusty bread or rolls

FAQs about Onions and Rabbits

As a general rule, rabbits should not eat onions. Onions are members of the allium family, which also includes garlic, shallots, leeks, and chives. Alliums are poisonous to rabbits and can cause anemia and gastrointestinal upset. If your rabbit eats even a small amount of onion, they may experience symptoms such as vomiting, diarrhea, lethargy, and difficulty breathing. If you think your rabbit has eaten onion or any other member of the allium family, contact your veterinarian immediately.

Tips for Feeding Onions to Your Rabbit

Onions are not typically considered part of a healthy diet for rabbits. In fact, they are actually on the list of foods that should be avoided altogether. However, there are some things to consider if you decide to feed your rabbit onions.

First, onions are very high in sulfur. This can cause gastrointestinal upset and diarrhea in rabbits. If feeding onions to your rabbit, do so in very small quantities and only occasionally.

Second, make sure the onions you feed to your rabbit are cooked. Raw onions contain compounds that can damage red blood cells and cause anemia in rabbits.

Finally, avoid feeding your rabbit onion skins or green parts of the onion plant. These parts of the onion plant contain compounds that can be toxic to rabbits.

If you decide to feed your rabbit onions, do so sparingly and make sure they are cooked before feeding them to your furry friend.


From everything we have gathered in our research, it is our conclusion that rabbits can not eat onions. They are simply too toxic for them. If you have a rabbit, we strongly advise against feeding them any onions or onion products.


Rabbits are leafy green vegetables, and onions are a member of the allium family which also includes garlic, chives, and leeks. Alliums are poisonous to rabbits in any form including cooked, powdered, raw, or in a supplement form. Even small amounts of allium can cause fatal hemolytic anemia in rabbits.

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Farmer Jack


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