5 Foods You Should Never Feed Your Guinea Pig

Rachel M.
by Rachel M.

Just like cats and dogs, guinea pigs can’t eat everything we can. Some foods are actually dangerous for them.


In this article, we’ll look at five foods you should always keep away from your piggy.


Please note, this isn’t an exhaustive list so, if you’re ever unsure, it’s best to check with a vet before giving your pet something new.

Guinea pig - image via Canva

1. Chocolate

Chocolate contains theobromine and caffeine, both of which are toxic to guinea pigs. Even a small amount can cause heart issues, seizures, or worse. Their bodies simply can’t process these compounds, making chocolate strictly off-limits.

2. Iceberg lettuce

Though it might seem like a fresh treat that a guinea pig would love, iceberg lettuce is mostly water and offers little nutritional value. It can also lead to diarrhea and digestive problems. Safer alternatives include romaine, green leaf, or red leaf lettuce. These greens are all more nourishing and gentle on the digestive system.

Guinea pig - image via Canva

3. Onions and garlic

Members of the allium family, like onions, garlic, chives, and leeks, are highly toxic to guinea pigs. They can damage red blood cells and lead to anemia or severe stomach distress. Even trace amounts should be avoided.

4. Dairy products

Guinea pigs are herbivores and naturally lactose intolerant. Feeding them milk, cheese, yogurt, or any dairy-based product can lead to bloating, gas, and diarrhea. So stick to plant-based foods!

5. Potatoes

Potatoes contain solanine, a toxic chemical that can be harmful to guinea pigs. Cooking doesn’t make them safe either, as guinea pigs should never consume cooked or processed foods. Avoid giving them any part of the potato, including peels or the eyes.

Guinea pigs eating a carrot - image via Canva

Final thoughts

Your guinea pig’s health depends on what you feed them. While treats and variety are important, knowing what to avoid is just as crucial.


Always do your homework before offering something new. When it comes to feeding guinea pigs, safe is always better than sorry.


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Rachel M.
Rachel M.

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