Can Guinea Pigs Eat Watermelon? (All the Information)

Can guinea pigs eat watermelon?

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Watermelon is a delicious, juicy fruit that the guinea pig can use in many ways. The fruit makes for a surprisingly healthy and nutritious part of your guinea pig’s diet.

Read on to get more information about the benefits of watermelon to your guinea pig.

Can Guinea Pigs Eat Watermelon?

Yes, guinea pigs can eat watermelon, but only in small amounts. You should cut the watermelon into small pieces so the guinea pig can swallow it. You should also remove the seeds before giving the watermelon to the guinea pig. 

Anyone who has ever had a pet guinea pig knows they are not the most sophisticated animals on the planet. They require constant attention from their owners, and as any rodent would, they can sometimes get bored quickly of the same old food every day.

This article will offer insights on how to feed your piggy with watermelon and other alternative foods you can try.

Feeding Instructions (Serving Size) and Possible Issues

Guinea pigs are very gregarious animals that must be kept in groups of 2-4. They are very active and will play for hours on end. Therefore, their cage must provide enough space for all of them to move around comfortably. So how do you feed them watermelons?

You may try to give the whole watermelon to your guinea pig. After all, they are just an animal like any other.

However, these rodents may need to learn when to stop eating. For good feeding, follow these steps.

  • Cut the watermelon into approximately one-inch square pieces and remove the seeds. If there is any red fruit along the edge of the skin, you can cut a piece of skin off it.
  • Remove all seeds since they may get logged on the throat and cause the rodents to choke. Finally, wash the watermelon to avoid feeding your guinea pig with germs and pesticides.
  • You can warm the watermelon to ease digestion for the rodent.
  • Offer a small amount to your guinea pig and observe their reaction.

The best amount to give the piggy is a maximum of two or three square-inch cubes per week. After that, if they enjoy it and show no ill effects, you can continue feeding them watermelon as a treat or in higher quantities.

The possible issues include diarrhea or an upset stomach, so monitor your guinea pigs closely after eating watermelon.

What Is the Nutritional Value?

Picture of a guinea pig eating watermelon

Watermelon is a delicious fruit that is high in both sugar and water. For guinea pigs, watermelon is an excellent source of hydration.

Furthermore, watermelon is high in vitamins A, C, and potassium. However, watermelon is heavy in sugar, which can be detrimental to guinea pigs if taken in significant quantities.

Watermelon is high in calories, which can be problematic if guinea pigs need to get more exercise. So while watermelon is a nutritious and delicious fruit for humans, it’s essential to be aware of the nutritional value and dangers to guinea pigs when feeding them watermelon.

Vitamin C is necessary for your guinea pig’s diet and can help improve their oral health and immune system. Furthermore, vitamin C protects guinea pigs from disorders such as scurvy.

Scurvy symptoms in guinea pigs include weariness, discharge, bleeding, loss of appetite, a rough coat, and diarrhea. On the other hand, Guinea pigs thrive on Vitamin C because they need it to help develop bones and bodies.

Pregnant guinea pigs also require a calcium-rich diet, which helps improve the babies’ bones and teeth.

Different Watermelon Parts to Feed Your Guinea pig

The best parts of watermelon to feed your guinea piggy:

Watermelon Rinds

The rinds of the watermelon contain phosphorus, an essential mineral for guinea pigs to have in their diets. The mineral helps prevent constipation from overeating foods high in fiber, such as beans or corn.

Watermelon rinds also provide vitamins A and C, essential nutrients that contribute to good health in guinea pigs.

Watermelon Seeds

Watermelon seeds are not poisonous to guinea pigs but are unsafe to eat. The hard black seeds are too big and pose a choking risk to guinea pigs.

It’s crucial to remove these before giving your guinea pig any watermelon. The watermelon seed’s white portion is safe for your guinea pig to consume, but it’s not exceptionally nutritious.

So if you feed your guinea pig watermelon, remove the seeds first.

Alternatives To Eating Watermelon For Guinea Pigs

Watermelons are a great source of potassium and vitamin C, both essential nutrients for guinea pigs. But they also contain other vital vitamins and minerals, including vitamins A, B6, and thiamine.

Nutritionists recommend these fruits as alternatives to watermelon:

Honeydew Melon

This sweet melon is also low in calories. Instead, it has a lot of fiber and very little sugar. You can find honeydew melons in many stores throughout the year, but they’re plentiful during the summer.

You can also buy them frozen at some grocery stores.


Strawberries are rich in vitamin C, an antioxidant that helps protect against inflammation in joints and muscles (which can lead to arthritis). They’re also good sources of antioxidants called flavonoids that fight free radicals caused by substances called reactive oxygen species (ROS).


Guava is a good vitamin C source and has plenty of fiber. In addition, the fruit is a good source of potassium and magnesium for guinea pigs.

Sweet Bell Pepper

Sweet bell peppers are a healthy and tasty treat and fruit for guinea pigs. They are high in vitamins A and C. They also contain tons of fiber, which helps with good digestion, and is essential if your guinea pig’s diet has a variety of meals. They can help improve the guinea pigs’ immune systems.

However, it is good to feed them in moderation since they can cause digestive upset.


Oranges are among the most widely available fruits in your local grocery store. They are high in vitamin C and contain many other nutrients, such as manganese, vitamin A, and vitamin B6.

Oranges are beneficial because they give the piggy energy throughout the day without making it feel overly full or bloated, like many other fruits do when eaten alone.


Tomatoes have a high concentration of lycopene, an antioxidant that combats harmful free radicals, which can contribute to cancer cell growth.

Tomatoes also contain potassium ions that help regulate blood pressure levels. Additionally, they include;

  • Fiber is an essential component of digestive health.
  • Vitamin C is vital in their diet.
  • Vitamin K, which aids in bone development
  • Folate, a B nutrient, promotes tissue growth.

Recommended Foods For Guinea Pigs

There are many recommended foods you can give to your guinea pigs. However, these foods will help them stay healthy and help them get the nutrients they need.


Guinea pigs have the exact dietary needs like rabbits and chinchillas, meaning they should have unlimited access to pet hay and pellets. As mentioned earlier, grass should be clean and free of pesticides, while pellets should contain at least 10% fiber.

Additionally, you can feed them with Timothy hay or other low-calcium hay. However, it is essential to note that some guinea pigs may have difficulty digesting this type of hay due to gastrointestinal problems or other health conditions.

Fruits and vegetables

The small piggies adorn many fruits, such as Cantaloupe, apples, kiwi, and bananas.

However, fruit should also be limited, as feeding too much of their high sugar content may lead to an imbalance of intestinal bacteria and cause severe and potentially life-threatening diarrhea.

The number of vegetables you provide your guinea pig daily depends on your pet’s appetite. Some guinea pigs experience diarrhea when provided with large amounts of fruit and vegetables, while others can eat it without a problem.

It’s good to introduce new vegetables once in a while to check if your pet enjoys and tolerates them. The best fresh, organically grown vegetables ideal for the piggy are:

  • Kale
  • Red and green leaf lettuces,
  • Romaine lettuce
  • Cilantro
  • Parsley
  • Red or green pepper
  • Broccoli

Fresh, clean water should be freely available. In addition, you must clean sipper bottles daily.

Foods To Avoid Giving A Guinea Pig

As guinea pigs are herbivores, they should not eat any meat. The meat includes chicken, beef, pork, and fish.

You should also avoid giving them dairy products, as their bodies cannot digest lactose properly. Therefore, yogurt, kefir, cream cheese, and cottage cheese are highly discouraged.

Garlic, onions, leeks, chives, and shallots can cause stomach upset in guinea pigs. Finally, avocados include a chemical known as persin, which can be hazardous to guinea pigs.

Other foods that the guinea pig can’t eat include;

  • Beans
  • Candy or chocolate
  • Tomato leaves and stalk
  • Iceberg lettuce
  • Rhubarb
  • Anything with glues, vanishes, or dyes
  • Plants treated with a pesticide

You should also avoid giving oats, seeds, nuts, and dry cereals since they are heavy in carbs and fat.

Bottom Line

Guinea pigs can eat watermelon, and they love munching on this refreshing treat that provides fiber, vitamins, and other important minerals. However, although guinea pigs can technically eat watermelon, it is not the best food for them and should only be given as a snack and in moderation.

Frequently Asked Questions

What part of the watermelon can guinea pigs eat?

As mentioned above, guinea pigs can eat the watermelon rind and flesh. Just make sure to remove the seeds before feeding them to your guinea pig.

Can guinea pigs eat watermelon and cantaloupe?

Yes, guinea pigs can eat both watermelon and cantaloupe. Just be sure to remove the seeds and offer it in moderation as part of a balanced diet.

Additional Sources & Resources

We also have a number of other guides related to guinea pigs, including:

And additional external resources if you want to take a deeper dive on guinea pig nutrition:

  • Guinea Pigs: A Complete Pet Owner’s Manual by Sharon Lynn Vanderlip. This book covers a variety of topics related to guinea pig care, including nutrition and feeding. It offers detailed information about what guinea pigs can and cannot eat, including watermelon.
  • The Guinea Pig Handbook by Paul D. Gwakye. This comprehensive guide to guinea pig care includes information about guinea pig nutrition and feeding. It covers the basics of what guinea pigs need to eat to stay healthy, as well as specific information about feeding watermelon to your guinea pig.
  • The Domestic Guinea Pig: Biology, Medicine, Surgery by J. G. Fox. This book is a comprehensive resource on the biology, medicine, and surgery of domestic guinea pigs. It includes a chapter on guinea pig nutrition, which covers the basic principles of feeding guinea pigs, as well as specific information about what they can and cannot eat.
  • Nutrient Requirements of Guinea Pigs by the National Research Council. This book is published by the National Academy Press and provides detailed information about the nutritional requirements of guinea pigs. It covers a variety of topics related to guinea pig nutrition, including specific information about the role of watermelon in a guinea pig’s diet.
  • Feeding and Care of the Pet Guinea Pig by Alice R. McLellan. This book is a practical guide to feeding and caring for pet guinea pigs. It covers a variety of topics related to guinea pig nutrition and feeding, including information about feeding watermelon to your guinea pig.

Pet News Daily Staff
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