Can Guinea Pigs Eat Tomatoes? (Benefits, Risks, Serving Size & More)

Often assumed to be a vegetable but the tomato is actually a fruit that belongs to the nightshade family which originated in South America. It is eaten by people all over the world in salads and main meals. Now you are probably wondering what about our cute little guinea pigs, can they eat this delicious treat? No worries as in this article we have covered in detail every potential question related to guinea pigs and tomatoes.

So, can guinea pigs eat tomatoes? Guinea pigs can eat tomatoes. In fact, guinea pigs can eat every type of tomato but special attention needs to be paid to the serving size of tomatoes because of the sugar when feeding them to your guinea pig. Also, tomato stalks and green leaves must be removed as they are toxic to guinea pigs.

The best and safe types of tomatoes to feed your guinea pig with are:

This was our short introduction to tomatoes as potential food for the guinea pigs. In the following sections, you will find more details on benefits, risks, or quick facts about tomatoes for guinea pigs. Let’s begin!

Are Tomatoes Good for Guinea Pigs? | Health Benefits

Are Tomatoes Good for Guinea Pigs

There are really many types of tomatoes and all of them have a wide array of benefits that can have a positive impact on the life of a guinea pig. The following are some of the best-known benefits of the tomatoes for guinea pigs:



  • Reduces Inflammation – Swelling can be caused by either disease or injury and it is a normal reaction from the body. It becomes an issue when it gets to chronic levels. Inflammation can cause several complications, including cancer and diabetes. To deal with inflammation you need antioxidants, and tomatoes are filled with them.

  • Aids in the Elimination of Free Radicals – Free radicals occur due to metabolic processes in the body and they can cause problems for our cute little guinea pigs. This is why you need to help your guinea pig to deal with them through the provision of foods that are rich in antioxidants, just like tomatoes. Free radicals, when accumulated in the system, can cause massive cell damage and different diseases.

  • Tomatoes Are Good for the Skin – Some compounds in tomatoes such as lycopene are known to provide the skin with nourishment and protection.


  • Strong Bones and Teeth – The presence of vitamin K in tomatoes means that your guinea pig will have healthy teeth and bones. This is important for guinea pigs since they are quite fragile animals.

  • Help with Digestion – Tomatoes have an average amount of dietary fiber that helps with digestion. Dietary fiber also helps with nutrient absorption on top of preventing digestive problems such as constipation.

  • May Contribute to Weight Loss – First of all, tomatoes have a low amount of calories present in them, and secondly, they induce satiety through dietary fiber. Both of these two reasons are attributed to weight loss properties since they reduce the intake and overall levels of calories in the guinea pig’s body.

Nutrition Facts of Tomatoes for Guinea Pigs

Nutrition Facts of Tomatoes for Guinea Pigs

These are the nutritional facts for 100 g of tomatoes:



As we can see, tomatoes have many nutrients that are beneficial for guinea pig’s health. It is of vital importance that tomatoes are very low in calories and have a good ratio of proteins, carbs and fiber.

There are many vitamins and the importance of vitamin C cannot be overstated. It is essential for the daily life of a guinea pig and should not be taken for granted, and vitamin K is an essential vitamin for blood clotting and bone formation/growth.

Also, folate is a compound that is needed by the heart to avoid failure. It is also vital for tissue growth and cell function. There is also a good amount of potassium and aside from preventing heart diseases and complications, this mineral also lowers the blood pressure.

Lycopene and beta carotene are powerful antioxidants that have benefits towards reducing inflammation and the existence of free radicals in the body and also help to improve sight, among many other functions.


Are Tomatoes Poisonous to Guinea Pigs? | Possible Risks

Are Tomatoes Poisonous to Guinea Pigs Possible Risks

You’ve probably already heard rumors that the tomato plant is toxic for some animals, but can guinea pigs have tomatoes without any risk? There are several risks associated with tomatoes. These are some of the potential risks of guinea pigs eat tomatoes:




  • Presence of Too Many Sugars – Some types of tomatoes contain a bit more sugar than it is needed by guinea pigs. This presents a problem. A way to regulate this is by offering the cavy tomatoes only once in a while, maybe one or two times per week.

Serving Size and Frequency of Tomatoes for Guinea Pigs

Serving Size and Frequency of Tomatoes for Guinea Pigs

When you feeding tomatoes to guinea pigs, it’s important to know can guinea pigs eat tomatoes every day or how much tomatoes you should give to them. This is exactly what we have talked about in the following sections. Let’s begin!


Can You Feed Tomatoes to Guinea Pigs Every Day?

Like any other vegetable or fruit, it’s not recommended to feed tomatoes to guinea pigs every day. The frequency of serving tomatoes to guinea pigs is two times a week. This is a good number that keeps a rich and balanced diet if you have also included different vegetables and fruits throughout the week.


How Much Tomato Can a Guinea Pig Eat?

How Much Tomato Can a Guinea Pig Eat

As we’ve said, guinea pigs shouldn’t eat tomatoes every day but also don’t give them too much of the tomato. You need to chop the tomatoes into smaller pieces for the guinea pig to eat comfortably without any problem. For the serving size never go more than half a cup or handful of tomatoes. In large amounts, tomatoes can be harmful to the guinea pig’s stomach and cause diarrhea.


Do Guinea Pigs Like Tomatoes?

Most guinea pigs like tomatoes, but some owners have also reported that their guinea pigs don’t like them. So, just like humans, guinea pigs have their own taste preferences and some of them will love tomatoes and some will not. It’s normal if your guinea pig doesn’t like tomatoes, there are many other great vegetables that you can give to it, such as cucumber, lettuce, peppers, and so on.


Can Baby Guinea Pigs Eat Tomatoes?

For baby guinea pigs it’s best to feed them with Alfalfa hay and water because it’s good for their growth and health. But can you feed tomatoes to guinea pigs when they’re just babies? It’s not recommended to feed tomatoes to baby guinea pigs if they’re just a few weeks old. After 3 or 4 weeks, you can introduce tomatoes and other vegetables and fruits to baby guinea pigs, but only in small amounts.


More Information About Guinea Pigs and Tomatoes

In the following sections, you can read about what kind of tomatoes can guinea pigs eat and also find out if you can give to guinea pigs any other part of the tomato plant, such as leaves, stems, or seeds. Let’s begin!


Can Guinea Pigs Eat Cherry Tomatoes?

Can Guinea Pigs Eat Cherry Tomatoes

Cherry tomatoes are smaller than regular tomatoes, and in shape and size are more comparable to cherries. So, can guinea pigs have cherry tomatoes? Guinea pigs can eat cherry tomatoes as they are sweet and delicious, but as always you need to be careful with the serving sizes. Give them one or two whole cherry tomatoes and unlike regular tomatoes, you don’t need to slice them into smaller pieces.

Can guinea pigs eat cherry tomato seeds? Guinea pigs can eat cherry tomato seeds because these seeds are small and soft, so they won’t be harmful to your little pets.


Can Guinea Pigs Eat Grape Tomatoes?

Grape tomatoes are similar to cherry tomatoes that mentioned above, but their shape and size are more comparable to grapes. So, can guinea pigs have grape tomatoes? Guinea pigs can eat grape tomatoes and they will enjoy eating them because grape tomatoes are tasty but not sweet as cherry tomatoes. They also can eat the seeds and skin of grape tomatoes.


Can Guinea Pigs Eat Tomato Leaves?

Can Guinea Pigs Eat Tomato Leaves

Despite many misunderstandings, humans can eat tomato leaves but are tomato leaves poisonous to guinea pigs, and can guinea pigs eat tomato plant leaves? Guinea pigs can’t eat tomato leaves because these leaves contain huge amounts of glycoalkaloids, i.e. tomatine and solanine that are toxic and harmful to guinea pig’s stomach and digestive system.

Also, tomato leaves contain calcium and phosphorus, both of which can be harmful to them and if taken in huge amounts can form kidney or bladder stones in guinea pigs.


Can Guinea Pigs Eat Green Tomatoes?

It all depends on which green tomatoes we’re talking about, unripe green tomatoes, or green tomatoes as a separate type of tomato? Guinea pigs can’t eat unripe green tomatoes, because these tomatoes contain solanine which can be harmful to them and cause diarrhea or vomiting. Solanine levels decrease in the ripe red tomatoes. For humans, it is recommended to eat unripe green tomatoes only if they were previously cooked or fried, but considering that guinea pigs can’t eat cooked food, they can’t eat unripe green tomatoes in any case.

On the other side, guinea pigs can eat ripe green tomatoes that never turn red, because they have almost the same nutrients as regular red tomatoes. They are a good source of vitamins, such as vitamin C and also minerals. Give them to guinea pigs only in small amounts and not very often.


Can Guinea Pigs Eat Yellow Tomatoes?

Can Guinea Pigs Eat Yellow Tomatoes

Guinea pigs can eat yellow tomatoes and these tomatoes are very delicious to them because they are usually sweeter than regular red tomatoes. Yellow tomatoes, just as regular tomatoes, have many nutrients that are beneficial for guinea pig’s health, like vitamin A, vitamin C, potassium, different antioxidants, and many others.


Can Guinea Pigs Eat Tomato Seeds?

As we know, guinea pigs shouldn’t eat some types of seeds, especially huge ones, but are tomato seeds bad for guinea pigs? Guinea pigs won’t have any problem eating tomato seeds. These seeds are unlike the other seeds that are usually huge and can pose a potential choking hazard to your guinea pig.

Tomato seeds have many powerful nutrients, such as vitamin C, vitamin A, and dietary fiber. All of that can offer a lot of benefits for guinea pigs. Don’t worry and feel free to give your guinea pigs seeds from tomatoes.


Can Guinea Pigs Eat Tomato Stalks?

Can Guinea Pigs Eat Tomato Stalks

We’ve already written above that guinea pigs shouldn’t eat tomato leaves, but can guinea pigs eat tomato stems or stalks and are tomatoes stems toxic to guinea pigs? Guinea pigs can’t eat tomato stalks (stems) or any other green part of the tomatoes, this also includes tomato tops and tomato vine. These green parts aren’t good for guinea pig’s stomach and digestive system, because of glycoalkaloids presence in them.


Can Guinea Pigs Eat Tomato Skin?

Guinea pigs can eat tomato skin because this skin is very thin and will not be a problem for them. Skins from vegetables and fruits usually contain more vitamins, minerals, and fiber than the inside parts, but a problem can arise if they are not organically grown. Tomato skin, just like any other skin from other vegetables and fruits can potentially be concentrated with pesticides.

Pesticides can be extremely harmful to guinea pig’s health. So before giving tomatoes to guinea pigs, wash them thoroughly or even better option is if you can buy organic tomatoes or grow some of them by yourself in your garden.


Can Guinea Pigs Have Canned Tomatoes?

Can Guinea Pigs Have Canned Tomatoes

Guinea pigs can’t eat canned tomatoes or any other canned vegetables or fruits. You shouldn’t give guinea pigs any type of processed or cooked foods, because it’s very hard for them to digest those foods. Guinea pigs enjoy only fresh and washed tomatoes, so try to provide them with as much organic food as you can.


Can Guinea Pigs Eat Roma Tomatoes / Plum Tomatoes?

Roma tomatoes are also known as plum tomatoes and they are small-sized oval plum-shaped red tomatoes and people use them mostly for making a sauce. Guinea pigs can eat Roma or plum tomatoes without any problems. These tomatoes are rich in vitamins and minerals just like regular tomatoes.


Can Guinea Pigs Eat Tomato Sauce?

Can Guinea Pigs Eat Tomato Sauce

Same as for canned tomatoes, guinea pigs can’t eat tomato sauce or any other processed or cooked foods. Guinea pigs are herbivores and they enjoy only fresh hay, fruits, and vegetables. Their digestive system is very sensitive and isn’t made to digest any type of processed/cooked food.


Quick Facts on Tomatoes

The following are some fantastic facts about tomatoes that you need to know:

  • There are different variants of tomatoes in the world.
  • Ketchup was initially a Chinese sauce that had no tomatoes in it. After a century, tomatoes were added to the recipe to improve the sauce.
  • When tomatoes are under attack from caterpillars, they emit a chemical that makes their leaves taste terrible.
  • In Egypt 2012, protesters where trowing tomatoes on Hillary Clinton.
  • Tomato juice is mostly made out of tomato sauce rather than fresh tomato fruits.
  • Research has shown the possibility of growing tomatoes on soil that is similar to dirt. This has led to the assumption that tomatoes can be grown on Mars.

Can Guinea Pigs Eat Tomatoes_1

Before I let you go, one final thought on food. With food, you can’t ever be too careful which is why I get all guinea pig food from a reliable source such as Amazon. If you are not sure what to order but believe your little piggies deserve some great treats please check our Helpful Guide to the Best Guinea Pig Treats to get some ideas. We have also made a full list of foods that guinea pigs can and can’t eat (150+ Types of Foods). Be sure to also check our recommended products page for everything you will ever need to assure a happy life for your Guinea Pigs. Hope this information was helpful and you have found the answer you were looking for.

If you found this post useful, would you mind helping out by sharing it? Just click one of the handy social media sharing buttons below so others can also learn about guinea pig food and diet!


List of Sources

Zilva, S. S., Vitamin C requirements of the guinea-pig, The Biochemical Journal, 1936.

O’Dell, B. L., Morris, E. R., Pickett, E. E., Hogan, A. G., Diet Composition and Mineral Balance in Guinea Pigs, The Journal of Nutrition, 1957.

Cannon, M. D., Emerson, G. A., Dietary Requirements of the Guinea Pig with Reference to the Need for a Special Factor, The Journal of Nutrition, 1939.

Odumosu, A., Wilson, C. W. M., Metabolic Availability of Vitamin C in the Guinea-pig, Nature, Volume 242, Issue 5399, pp. 519-521, 1973.

National Research Council (US) Subcommittee on Laboratory Animal Nutrition, Nutrient Requirements of Laboratory Animals: Fourth Revised Edition, 1995., Washington (DC): National Academies Press (US); 1995.

Norman, R., Wills, A. P., An Investigation into the Relationship between Owner Knowledge, Diet, and Dental Disease in Guinea Pigs (Cavia porcellus), Animals: an open access journal from MDPI, 2016.

Townsend, G.H., The guinea-pig: general husbandry and nutrition, The Veterinary record, 1975.

Bruce, H. M., Parkes, A. S., Feeding and breeding of laboratory animals III. Observations on the feeding of guinea-pigs, Cambridge University Press, 2009.

Witkowska, A., Price, J., Hughes, C., Smith, D., White, K., Alibhai, A., Rutland C. S., The Effects of Diet on Anatomy, Physiology and Health in the Guinea Pig, Journal of Animal Health and Behavioural Science, 2017.

Hirsch, E., Some determinants of intake and patterns of feeding in the Guinea pig, Physiology & Behavior, 1973.

Willcox, J. K., Catignani, G. L., Lazarus, S., Tomatoes and Cardiovascular Health, Critical Reviews in Food Science and Nutrition, 2003.

Beecher, G. R., Nutrient content of tomatoes and tomato products, Proceedings of the Society for Experimental Biology and Medicine, 1998.

Shi, J., Kakuda, Y., Yeung, D., Antioxidative properties of lycopene and other carotenoids from tomatoes: synergistic effects, Biofactors, 2004.

Clarissa Moolbrock

Clarissa Moolbrock is one of the founders and editor at Guinea Pig Tube. She is also an author of "Complete Guinea Pig Care Guide: The Essential, Practical Guide To All Aspects of Caring for Your Guinea Pigs" (available on Amazon). Being a veterinary technician helping animals and sharing her experience and knowledge with other guinea pig owners is her passion. Her life goal is to popularise guinea pigs as pets and that is why she has started Guinea Pig Tube website.