What Do Guinea Pig Eat?

Guinea pigs are adorable and sociable pets that require plenty of love and attention. However, one of the most important aspects of caring for a guinea pig is ensuring that they receive a healthy and balanced diet. In this article, we will discuss the peculiarities of guinea pig nutrition, including their digestive system, a healthy diet, common misconceptions, and foods to avoid.

Guinea Pig Digestion in General

Guinea pigs are herbivores, which means that their digestive systems are designed to break down plant-based foods. They have a unique digestive system that consists of a large cecum, a pouch-like organ located between the small and large intestines. The cecum contains beneficial bacteria that ferment plant fibers and break them down into nutrients that the guinea pig can absorb.

Unlike other animals, guinea pigs cannot produce vitamin C on their own, so they must obtain it through their diet. This means that they require a diet that is rich in vitamin C, as well as other essential nutrients, such as fiber, protein, and calcium.

A Healthy Diet for Guinea Pigs

A healthy diet for a guinea pig should consist of a variety of fresh hay, vegetables, and fruits. Fresh hay should make up the majority of their diet, as it provides the necessary fiber and helps to wear down their teeth. Guinea pigs also require fresh water at all times to stay hydrated.

Vegetables that are safe for guinea pigs to eat include:

  • Carrots
  • Bell peppers
  • Cucumbers
  • Spinach
  • Kale
  • Romaine lettuce
  • Broccoli
  • Parsley
  • Cilantro

Fruits that are safe for guinea pigs to eat include:

  • Apples
  • Bananas
  • Strawberries
  • Blueberries
  • Grapes
  • Melons

It is important to introduce new foods slowly, as guinea pigs have sensitive digestive systems. Start with a small amount of a new food and monitor your guinea pig for any signs of digestive upset, such as diarrhea or bloating. If your guinea pig does not show any adverse reactions, you can gradually increase the amount of the new food in their diet.

Misconceptions About Healthy Foods for Guinea Pigs

There are many misconceptions about healthy foods for guinea pigs. Some of the most common include:

Seeds and Nuts

Many people believe that seeds and nuts are a healthy snack for guinea pigs. However, these foods are high in fat and can cause digestive upset, such as diarrhea and bloating.

Dairy Products

Guinea pigs are lactose intolerant, which means that they cannot digest dairy products. Feeding your guinea pig cheese or yogurt can cause digestive upset and other health problems.


Guinea pigs are herbivores and should not be fed meat or other animal products. Their digestive systems are not designed to break down these foods, and they can cause serious health problems.

Foods to Avoid

In addition to the foods listed above, there are several other foods that should be avoided when feeding your guinea pig. These include:

  • Chocolate
  • Avocado
  • Onions
  • Garlic
  • Potatoes
  • Rhubarb
  • Tomatoes

These foods can be toxic to guinea pigs and can cause serious health problems, including organ damage and death.


In conclusion, a healthy and balanced diet is essential for the health and well-being of your guinea pig. Their digestive systems are unique and require a diet that is rich in fiber, vitamin C, and other essential nutrients. By providing your guinea pig with fresh hay, vegetables, and fruits, and avoiding harmful foods, you can help to ensure that they live a long and healthy life.

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