Can Guinea Pigs Eat Onions? (Good or Bad)

Onion is a vegetable full of antioxidants and Vitamin C that provides several health potentials to human beings. But what about your little guinea pig? Can guinea pigs eat onions too? Are they beneficial to them?

Onions are toxic to most animals, including guinea pigs. Also, Onion peels, skin, seeds, raw onion, and leaves are unhealthy for your guinea pig. Feeding onions to guinea pigs can be life-threatening to them. Onion contains a compound, ‘disulfide,’ that causes anemia in guinea pigs.

You will find all the answers related to onion and guinea pig in this blog.

Can Guinea Pigs Eat Onions?


No, Guinea pigs can’t eat onions. It gives little nutritional benefit and more harm to your little pet. So, you should avoid feeding onion to your guinea pig.

Disulfide in onions can cause anemia in guinea pigs. And the sugar content in onions can trigger several digestive issues.

One should totally avoid onions for guinea pigs to avoid any further complications.

What Happens If Guinea Pigs Eat Onion?

If a guinea pig eats onion, it can cause health problems like Hemolytic anemia and anaphylactic shock.

Compounds like disulfide and thiosulphate are poisonous to guinea pigs and can be life-threatening because they kill red blood cells in your little pet. If a guinea pig eats onion, it can cause irritation in the eye and mouth, nasal secretion, respiratory & breathing problems, excess salivation, stomach disturbance, and difficulty in the urine.

Risks to Consider If You Feed Onions to Your Guinea Pig

Following are risks to consider if you provide onions to your guinea pig;

Digestive Issues

Guinea pigs have a sensitive digestive that can upset quickly. Onions are rich in antioxidants that cause several digestive problems in guinea pigs like Diarrhea and anemia.

Intestinal Issues

Feeding onions to your guinea pig can also cause intestinal issues.


Onions are incredibly toxic to guinea pigs. Its skin, seeds, flesh, and leaves all contain an oil-soluble compound known as ‘disulfide.’

Can Guinea Pigs Eat Spring Onions?

Like onions, spring onions should also not be fed to guinea pigs. Spring onions belong to bulb veggies, so the cavies can consume only the top green leafy parts. The onion bulb is not good food for guinea pigs and may contain nutrients that are either mildly toxic or too strong.

Can Guinea Pigs Eat Green Onions?

No, green onions are also a kind of onions, with nutrients equivalent to onions. These vegetables cannot be cleansed and made healthy for guinea pigs.

Cooking onions will not take the toxins out, and fried vegetables will never be consumed by guinea pigs.

Also, frozen onions would make your pet no safer. Too much fresh fruit and vegetables are ideal for small animals.

Concentrate on feeding them to your guinea pigs. Onions are not also delightful to pigs who enormously enjoy sweet flavors. Vitamin C and other essential ingredients can come from other, more stable sources for your pet.

Can Guinea Pig Eat Green Onion stems?

Like onions, onions stems also have toxic substances harmful to little guinea pigs. Can guinea pigs eat green onion stems? No, guinea pigs can’t eat stems. Why? Because they are toxic too.

Can Guinea Pigs Eat Red Onions?

Just like green onions, guinea pigs can’t eat red onions too. Red onions are just like green onions and have the same toxicity. Hence, you should not be fed any kind of onion to your little guinea pig.

Can Guinea Pigs Eat Onion Skin?

No, guinea pigs can’t either eat onions or onion skin because onion skin also has harmful toxins. This can also lead to choking hazards in a guinea pig, so this must be avoided entirely.

If a guinea pig eats a small amount of the onion skin, then don’t panic but still keep an eye on its health for any changes. And if guinea pig overeats onion skin, then immediately visit a vet.

What Foods are Toxic to Guinea Pigs?

If you own a guinea pig, you should know what foods are poisonous and healthy. Here is the list of foods that are poisonous to your adorable guinea pig:


Following is the list of vegetables that you must not feed to your guinea pig:

  • Onions
  • Potatoes
  • Avocados
  • Iceberg
  • Garlic
  • Radishes
  • Sweet peas
  • Rhubarb and its leaves
  • Cabbage
  • Dried beans, corn, and peas

Grains, Nuts, and Seeds

Following is the list of grains, nuts, and seeds that you must not feed to your guinea pig:

  • Rice
  • Grains
  • Nuts(Not all nuts)
  • Cereals of any kind
  • Seeds of any kind

Processed Foods

Following is the list of processed foods that you must not feed to your guinea pig:

  • Bread
  • Biscuits
  • Peanut butter
  • Chips
  • Sugary foods
  • Pickle
  • Crackers
  • Dairy products
  • Potato chips

Household Garden Plants

Following is the list of household garden plants that you must not feed to your guinea pig:

  • Foxglove
  • Daffodils
  • Lilies of all types
  • Shrubs
  • Nightshade

Final Thoughts

Answering the question, Can guinea pigs eat onions? I have responded to all the possible problems. You have learned that guinea pigs can’t eat onions at all. They are entirely toxic and harmful to them.

Onion peels, skin, seeds, raw onion, and leaves are unhealthy for your guinea pig. Feeding onions to guinea pigs can be life-threatening to them. Feed your fluffy guinea pig other fruits and vegetables that are safe for their health. But onions are not one of them.

Onions are not the right choice for your adorable guinea pig because of toxins and other harmful substances. It is advised not to feed onion to your guinea pig keeping all the safety parameters. I hope this blog helps you out with all the questions related to guinea pigs and onions.

SmallPetsX.Com does not provide veterinary advice. Our aim to help small pet owners understand their pets a little better so that they can provide their pets with the life they deserve. All content is therefore for informational purposes only. If you're concerned about the health of your pet you should seek medical advice from a vet.

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