Find Discounts on Your Favorite guinea pig Products and Save Up To 20%!

Let's Go!

Can Guinea Pigs Eat Watermelon? (Serving Size, Hazards & More)

We may earn a commission if you click on a link, but at no extra cost to you. Read our disclosure policy for information.

Tim Rhodes

In this article, we answer the question “Can guinea pigs eat watermelon?” and provide extra information that will help you decide how much watermelon you should give to your pet.

You will learn how often a guinea pig can eat watermelon and whether watermelon rind and juice are safe for your guinea pig, one of the most kept pets in the world.

According to studies, guinea pigs in the UK have reached four hundred thousand in the year 2018 and 2019.

Surprisingly, these little animals have a lifespan of five to seven years, and these tiny creatures become an integral part of your life in the meantime.

A healthy and loved guinea pig is a happy guinea pig!

Can Guinea Pigs Eat Watermelon?

The answer to the question of whether guinea pigs eat watermelon is yes, guinea pigs can eat watermelon.

Watermelon is a giant succulent fruit with a green envelope of a hard green layer that protects the inside flesh from damage.

We are sure most people are familiar with watermelons because, in many countries, watermelons are one of the ideal hot summer treats, as they keep sugar and water at optimum levels.

Most guinea pigs love watermelon.

Just like people, guinea pigs eat watermelon with great delight.

Actually, feeding watermelon to your guinea pig has a few health benefits.

This fruit contains vitamin C, which is an essential part of your pet’s diet.

However, your guinea pig can eat it only in moderation.

Excessive amounts of any fruit and vegetable are not good for your guinea pigs.

Cut watermelon into little, bite-sized cubes they can easily nibble.

Also, never feed your guinea pigs with more than a cube of watermelon every few days.

However, unlike people, guinea pigs eat watermelon rind as well!

Yet, when it comes to watermelon rind, the best is to wash the watermelon thoroughly and remove the outer green layer.

Make sure that you don’t feed watermelon seeds to your guinea pig pet.

What Is the Nutritional Value of a Watermelon?

So, the question “Can guinea pigs eat watermelon” becomes “What are the benefits of feeding watermelon to my guinea pig?”

Let’s see.

Vitamin C

Vitamin C is a vital factor in your pet’s diet.

The body of a guinea pig doesn’t produce vitamin C, so you have to supplement it if you want your guinea pig to be healthy, with a strong immune system.

Your guinea pig has to have an adequate supply of vitamin C as lack of vitamin C can cause scurvy, which is a lethal disease for your guinea pig.

According to experts, humans need 10 mg of vitamin C per day to prevent scurvy. and you can easily get such an amount from 100g/ 3.5 oz of watermelon.

Additionally, most experts state that a guinea pig’s daily needs of vitamin C are between 30-50mg/kg.

Yet, your guinea pigs cannot eat much of any fruit or vegetable.

Make sure that your pet’s diet rests on fiber, which they need as much as they need vitamin C.

Therefore, the serving size of this fruit should never be larger than a tiny cube per day because of its high sugar content.

The recommended serving size is actually one or two small cubes once or twice a week during the summer months.


Watermelon is a good organic source of important nutrients.

Yet, you should also note the high sugar content in this fruit is not good for guinea pigs.

That is one of the reasons why guinea pigs can eat watermelon only in moderation.

A good idea is to carve the watermelon rind in a way that only a small amount of watermelon flesh remains as a treat for your guinea pig.

An even better option is if you remove the outer green layer of the rind and serve only the yellow parts to your pets.

That way, you will have better control of the amount of sugar your guinea pig eats.

Otherwise, your guinea pigs can develop diabetes and obesity, which cause other serious health problems, just like in humans.

Therefore, the best guinea pig diet includes less sugar and fats but more vitamin C and fiber.


Guinea pigs should consume much fiber.

Fiber is the main source of your pet’s diet, as in the wild they feed on grass and plants.

Watermelon has traces of fiber, which is okay for a tasty treat.

Of course, the tiny cube of watermelon you will give to your guinea pig is insufficient for your guinea pig’s daily dietary needs.

Nonetheless, the fiber content in watermelon is another reason why you should feed your pet with it albeit occasionally and in small amounts.

Again we have to repeat that excessive amounts of fruits and vegetables can cause harm to your guinea pig.

Don’t forget that, in the wild, their diet rests on grasses, plants, herbs, twigs, and, occasionally, roots and barks.


Apart from vitamin C, watermelon has other nutrients as well.

Vitamin A, potassium, phosphorus, and calcium are present in watermelon and all are vital for normal body functioning.

According to researchers, the selenium present in watermelon aids in the immunity of your guinea pig.

This certainly confirms the benefits of this fruit for your guinea pig.

Does My Guinea Pig Like Watermelon?

How does your pet react to the food it likes?

You will notice the same reaction if your pet likes watermelon.

However, if you haven’t feed your guinea pig with this fruit before, you should test your pet’s initial reaction to it.

We suggest that you introduce a cube of watermelon to your pet and observe the response.

If your fluffy friend eats that cube, you are welcome to offer another one.

Yet, remember that guinea pigs should only eat small amounts of fruits and vegetables combined.

In other words, make sure never to feed your guinea pig with more than 1/4 – 1/2 cup of mixed fresh fruits and vegetables.

These two cubes already count towards that amount, so be careful.

However, if your pet doesn’t eat the first cube of watermelon you offer, it’s okay.

Don’t force it.

Another option is to try feeding your guinea pig with the watermelon rind.

Eliminate the green part and serve only the yellow part of the watermelon, also cut into small cubes.

Guinea pigs can eat the watermelon rind, and some guinea pigs love it much more than they do the red part.

However, wash the rind thoroughly before cutting it and serving it to your pet.

If your pet won’t eat the rind, there are other options!

You can try feeding your pet with some other fresh fruits such as peaches, which are also a great source of fiber, minerals, and vitamins, especially vitamin C.

Regardless of the type of fruit that’s on the safe list for your guinea pig, never feed your pet with the same fresh foods every day.

Instead, mix different types of fresh fruits and vegetables, so that watermelon (or some other fruit) is on the menu only once or twice a week.

Serving Watermelon to Your Guinea Pig

Serving watermelon to your guinea pig is an easy task.

All you need is a cutting board and kitchen knife.

Take the fresh watermelon, place it on the cutting board, cut it open, and remove the seeds, as they are a choking hazard to your pet.

Guinea pigs eat watermelon in small amounts so cut the watermelon into small cubes.

You can include the watermelon rind and leave only a tiny layer of red flesh, which is high in sugar.

Although you would only eat the red juicy, succulent part of the watermelon, your guinea pigs eat watermelon rind as well.

Guinea pigs can eat watermelon only in small amounts: two small cubes of watermelon, once a week, maybe twice if you are giving them only a small amount of small cubes.

That’s all.

Can Baby Guinea Pigs Eat Watermelon?

While baby guinea pigs feed only on their mother’s milk and, by the time they are three weeks old, they can start consuming water and alfalfa hay and pellets.

Alfalfa hay is the best for your small baby guinea pig’s diet as it contains protein and calcium, important for growth and development.

Gradually add other types of hay to your pet’s diet and eliminate alfalfa.

The calcium in alfalfa is beneficial for babies but can be harmful to adult guinea pigs.

By the time they can eat alfalfa, they can start eating small amounts of fresh vegetables and fruits.

Because of high sugar content, it’s best if you first introduce watermelon to your guinea pig when they are already a few months old.

Is Watermelon Rind Safe for Guinea Pigs?

You might be wondering if guinea pigs can eat watermelon rind; yes, that’s a legit question.

Yes, guinea pigs eat watermelon rind and some prefer it over other foods!

The inner surface of the rind is not as hard, and guinea pigs can digest it.

However, we recommend that you keep the thick green portion of the watermelon rind out.

Instead, feed your guinea pigs only with the white portion of the watermelon only, as it contains more fiber, essential for your guinea pig’s diet.

Excessive amounts of the rind can cause health problems such as digestion issues and diarrhea, so it’s best if you feed your pet with watermelon flesh and watermelon rind only once or twice a week during the hot summer months.

Is Watermelon Juice Healthy for Guinea Pigs?

Let’s answer this question immediately!

You should not introduce watermelon juice to your adorable buddy.

Watermelon juice is rich in sugar content, and much sugar is bad for your pet’s health.

Other plausible reasons can be the risk of obesity, hypertension, diarrhea, etc.

Watermelon juice will only create problems.

Watermelon Rind vs Fruit

Both watermelon rind and flesh have nutritional value.

The fleshy part of this fruit contains a lot of sugar and water.

Automatically, this implies that watermelon rind is a much better option for your guinea pig.

However, guinea pigs eat watermelon with pleasure, the rind and the red fleshy part equally.

Nonetheless, many guinea pig owners will confirm that their guinea pigs are crazy about rind!

For that reason, wash the watermelon thoroughly before cutting the watermelon rind into small pieces and feeding it to your guinea pigs.

Can Guinea Pigs Eat Watermelon Seeds?

We have confirmed that guinea pigs can eat watermelon and even watermelon rind, but the question of whether guinea pigs eat watermelon seeds has not yet been answered.

So, can guinea pigs eat seeds?

Although watermelon seeds are not toxic and won’t cause digestive problems to your guinea pigs, all seeds present danger to your pet.

Never feed your guinea pigs with seeds of any kind.

Guinea pigs can eat only the fleshy parts of fruits and vegetables, so whenever there are seeds present, remove them.

Therefore, before serving watermelon to your guinea pigs, take all the seeds out.

Make sure that none of the seeds is left in the watermelon cube you are giving to your guinea pigs.

Likewise, you can buy watermelon without seeds.

Can Guinea Pigs Eat Yellow Watermelon?

Yes, guinea pigs can eat watermelon of any color, including yellow watermelon.

The yellow color of watermelon is caused by the lack of lycopene, which is the pigment responsible for giving red color to watermelon.

Yet, yellow watermelon is much sweeter than red watermelon.

So, make sure to give your guinea pigs even smaller quantities of yellow watermelon than you normally would of the red one.

How Often Should My Guinea Pig Eat Watermelon?

As you’ve learned earlier, guinea pigs can eat watermelon rind and the fleshy red part of the watermelon as well.

However, there’s another question: how much watermelon guinea pigs can eat?

Fresh vegetables and fruits and shouldn’t compose the majority of your guinea pigs’ diet.

On the contrary; they are recommended in small quantities.

A general rule of the thumb is that, per day, your guinea pigs should only consume 1/4 or 1/2 of a cup of mixed veggies and fruits cut into small bite-size chunks.

Therefore, never give your guinea pig a whole slice of watermelon!

Instead, feed them with fruits two to three times a week and never for two simultaneous days.

What Food a Guinea Pig Shouldn’t Eat?

Apart from wondering if guinea pigs can eat watermelon, there are many other vegetables, fruits, plants, and herbs for which you might be wondering the same.

Guinea pigs are little herbivores that can eat green plants, but there are many foods that your guinea pigs shouldn’t eat.

When it comes to vegetables, your guinea pigs shouldn’t eat avocado, garlic, beans, Christmas pepper, iceberg lettuce, paprika, potatoes, sweet pea, olives, and rhubarb.

You should know that these vegetables are toxic and they can cause problems in the long run.

For example, you can feed your guinea pig with the inside of the avocado.

Generally, the inside of avocado is safe and partially healthy.

Partially healthy because they have fiber and contain vitamin C, K, and A but also are high in fat, which is unhealthy for your pet.

You should completely exclude foods that contain fat and never give it to your guinea pigs.

Fruits such as coconut and cherries can also be harmful to your furry pet.

Some seeds and herbs can be harmful as well.

Never feed your piggies with nuts, coffee, jasmine, iris, lilac, and seeds of any kind.

As herbivores, guinea pigs cannot eat meat and they cannot digest it.

Also, never give seeds of any kind to your guinea pigs as they present a choking hazard for them.

If you are trying to switch the feed or introduce new food to your pets, start by mixing it with foods your guinea pigs already know well and eat.

Guinea pig’s diet rests on fiber, especially hay and guinea pig pellets that are designed to provide optimum nutrients for your guinea pig’s daily diet.

Final Thoughts

Now you know how much watermelon can guinea pigs eat, that they can eat watermelon rind, too, and that they should never eat watermelon seeds.

Watermelon contains vitamin C and fiber, which has health benefits and is good for guinea pigs.

However, feeding watermelon to your guinea pigs more than one to two small cubes is not a good idea.

The same applies to any other fruit or vegetable because some of these products contain much sugar or other components that are not good for your pet’s health.

The recommended serving size of mixed fruits and vegetables per day is between 1/4 and 1/2 of a cup.

Therefore, your little furry friend can eat watermelon but in moderation.

Instead, base your pet’s diet on fiber and pellets, designed to provide the best proportion of nutrients your guinea pig needs daily.

In a Hurry?

Take a look at the most popular and trending guinea pig products.