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Can Guinea Pigs Eat Leeks?

Guinea pigs love to eat a variety of different types of fruits and veggies from your kitchen. However, just because produce is safe and healthy for us humans, doesn’t necessarily mean that these foods are safe for your pet. This includes root vegetables like leeks. Can guinea pigs eat leeks? Dr. Jess breaks down whether or not leeks are healthy and safe for your little piggie to consume in the article below.

white and brown guinea pig face

A guinea pig is a type of pocket pet that resides in the cavie family of animal, which grow to a maximum of 10-11 inches long, and can weigh up to 2.5 pounds as an adult.

They are quite playful animals, love to socialize, and make great pets for responsible pet owners- those wanting a loveable pet that comes in a small package.

What Do Guinea Pigs Typically Eat?

Guinea Pigs eat an assortment of things to keep them healthy and happy.

  • High-quality guinea pig food and Timothy hay should be the main staples of their diet.
  • Up to about 10% of their diet can be made up of an assortment of vegetables and fruits, with fruits and vegetables over 12-24 hours old being discarded as soon as possible.
  • They require 30 – 50 mg of vitamin C daily from their diet, either in their guinea pig food, a vitamin supplement, or from fruits and vegetables that are high in vitamin C. I’ll get to this more here in a sec…
  • Guinea pigs do best with diets low in fats and sugars.
  • Clean, fresh, filtered, chlorine-free water. ‘Fresh water‘ means that is is changed daily. ‘Changed daily‘ means that new water is placed into a CLEAN water dispenser!

Let’s Talk Leeks…

Leeks are a vegetable that is related to onions, garlic, and chives.

They have an edible stalk that is safe for human consumption. People commonly describe their flavor as having a light onion type taste.

Many cooks around the world use leeks, both raw and cooked, in their recipes, including in soups, stews, salads, and accompanying potatoes.

three leeks laid on white background

Leek Nutrition: states that leeks:

“Leeks are nutrient-dense, meaning that they’re low in calories yet high in vitamins and minerals.”
  • Lower AND Higher Nutrient Contents: High in good things like water and fiber, and lower in things that could be harmful, such as fat and calories [source]!
  • Inflammation/Antioxidants: Studies show that leeks are a source of flavonoids, a type of antioxidant, which are anti-inflammatory compounds that help in fighting against inflammation.
  • Vitamins: A leek contains vitamin C and K. Guinea pigs need vitamins to stay healthy and to allow their bodies to function properly. Vitamin C helps guinea pigs stay safe and adequately protected from diseases and strengthens their immune system and they require this vitamin in their diet to stay healthy. Vitamin K is important in bone strength and blood clotting.

Can Guinea Pigs Eat Leeks?

After learning about some of the health benefits that leeks have for humans, wouldn’t it be nice it you knew that you could safely feed it to your piggie?

Well, you definitely should not…. not even in moderation. They CAN eat leeks, but they should never eat leeks!

That’s right, feeding a small amount of leek, even as a treat, to your guinea pig on occasion is not recommended!

Are Leeks Harmful to Guinea Pigs?

We should definitely try to understand the risks involved, if we do feed our pets leeks.

I’ll start by saying that leeks can be quite harmful.

Remember that too much leek fed to these little buddies can give them side effects like an upset stomach, gas, bloating, and diarrhea. Leeks can even be toxic to guinea pigs.

This can lead to a multitude of problems including things like dehydration and electrolyte imbalances that could impart a trip to the veterinary clinic for your pocket pet vet to fix.

Here are three factors to keep in mind:

group of leeks on wooden table with roots showing

Harmful Reason #1: Toxic Sulfides

That’s right. Leeks contain sulfides, which are toxic to guinea pigs in large enough quantities.

This fact right here, should be enough in itself, to prove to you, that your guinea pig should not be fed leeks.

Harmful Reason #2: Loose Stool/Diarrhea

Too much of any fruit or vegetable can produce hypermotile, or increased movement, of one’s digestive tract.

Some guinea pigs are more sensitive to additional foods or changes in their diets, so they are more likely to have loose stool and in some cases, full-blown diarrhea.

Other guinea pigs will not be impacted by any additional changes in their diets.

Harmful Reason #3: Allergic Reaction to Leeks

A guinea pig can develop an intolerance or an allergy to any food, so there is always the possibility that your pet is allergic to leeks.

If you suspect your guinea pig is allergic to leeks do NOT feed this food to your pet.

If your guinea pig is allergic to leeks and accidentally ingests it, go to your nearest animal emergency room immediately.

When this happens, the attack sets off a hypersensitivity reaction and can result in any of the following symptoms:

Common symptoms of adverse/allergic reaction to food:

  • Nausea/vomiting
  • Diarrhea
  • Itching/Increased grooming
  • Fever
  • Lethargy
  • etc.

How About Cooked leeks?

No, you should never feed your guinea pig cooked leeks.

A guinea pig’s digestive system is not built to handle or digest cooked vegetables properly. This can lead to major issues for your guinea pig’s gastrointestinal system.

Never feed your guinea pig cooked vegetables, cooked leeks included.

brown and white guinea pig profile of face



You want the best for your guinea pig- thats why you are reading this article. Therefore, please be aware of the detrimental effects that leeks can have on your piggie if they consume leeks. It is just not worth the risk.

Whether you are considering fresh, cooked, or dried leeks- all forms can have dire effects if given to your pet. It is best to stay away from feeding this onion-like vegetable to your pet, and stick to giving them safe alternatives that were listed in the section above instead.

If your pet does accidentally snack on some leeks, contact your local veterinarian for more guidance. They may have follow up questions or may want to evaluate your pet in person, so contact them as soon as you can for help.

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