Can Guinea Pigs Eat Weetabix? (Benefits, Risks & More)

I can’t imagine starting the day without a nice breakfast. And for me, and probably for most of you, breakfast is always something like cereals, or biscuits and milk. Nobody can resist the various types of sweet, crunchy foods and for me, this is the tastiest instant breakfast food – wholegrain and soft sweet biscuits dipped in milk! And we have to admit, sometimes when we eat these breakfast foods, we get tempted to give a few biscuit pieces to our guinea pigs. Because we spoil our guinea pigs and we would love if our pets could munch on the same tasty foods like us. Now let’s talk about Weetabix and if your guinea pigs can eat this type of food.

Can guinea pigs eat Weetabix? No, guinea pigs cannot eat Weetabix. Guinea pigs cannot consume Weetabix because these biscuits are processed foods, and the guinea pigs are not good at digesting any processed food. The guinea pigs are herbivores and vegetarians, so their diet must consist of raw foods, pellets, fruits, and veggies. Processed and seasoned foods are not beneficial for them, and they are not good for their stomachs.

Now you have surely brainstormed some other ideas like, ‘what if the guinea pig tries sugar-free biscuits’ or ‘what if it tries unsweetened wholegrain products’, right? Well, these are also not good options, and every similar breakfast food like Weetabix is still processed to some extent.

Just in case you want to know everything about these biscuits and why guinea pigs can’t eat them, we have provided more details in the following sections below.

Health Benefits of Guinea Pigs Eating Weetabix

Unfortunately, the guinea pigs can’t consume every single food that we can. If we imagine that the guinea pigs could eat these biscuits, they would have these following benefits:

  • Rapid weight gain (if the guinea pig is underweight)
  • Faster digestion (if the guinea pig suffers from severe constipation and needs lots of fiber at once)
  • Healthier blood and less risk of anemia (due to the iron content in Weetabix)

However, the guinea pigs don’t need to consume this and suffer many side-effects, when instead, they can other food that have the same benefits of the Weetabix.

Nutrition Facts of Weetabix

Per a 100 g (3 oz) of Weetabix Original, these are the nutrition facts:

  • High in calories – 362 calories. This is too much even for us humans. When we are on a diet, such biscuits with a ton of calories are not the best meal choice. So, for the guinea pigs, this would be a very fattening food too.


  • A moderate amount of fat – 2g. The amount of fat in Weetabix is normal, and this amount of fat is not a health risk.


  • High in carbs and protein – Weetabix biscuits have a high amount of carbs, 69 g, and a high amount of proteins, 12 g. Out of these main energy sources, the carbs, affect the weight more than the proteins. Again, these biscuits keep proving they are not the most diet-friendly food.


  • High in sugar – 4.4 g. There is quite a lot of sugar in these biscuits too! No matter how healthy some cereals or biscuits are, there are always sugars in them. This amount of sugar is not good at all for the guinea pigs, because they don’t digest sugars well. If they consume processed foods with sugar, they will get cramps and diarrhea.


  • High in fiber – 10 g. For us humans, the breakfast foods that are high in fiber are good for our gut health. Majority of us lack fiber in our diets, so the breakfast biscuits and digestive crackers are a good choice for us. But, this amount of fiber is too high for the guinea pigs. Excess fibers can cause them loose stool and flatulence.


  • Riboflavin (B2) – 1.2 mg. The B2 vitamin converts the foods into energy. Also, this vitamin improves the oxygen flow through to every cell.


  • Niacin (B3) – 14 mg. This vitamin lowers cholesterol and high blood pressure, it prevents diabetes, heart problems, and it improves skin quality.


  • Iron – 12 mg. The iron is one of the most vital minerals for the organism. It is found in the red blood cells. Iron removes fatigue and weakness, it boosts the immunity and helps to prevent anemia.

Risks to Consider When Feeding Weetabix to Guinea Pigs

  • Unhealthy weight changes – Weetabix biscuits are not very diet-friendly or good for maintaining a healthy weight. They are too high in calories, carbs and also some proteins. The calories and carbs in excess can always contribute to rapid weight gain. So, if your guinea pig has a healthy weight, just know that Weetabix could create obesity.


  • Problems with digestion – Weetabix contain a lot of sugar, and this is a huge red flag for our adorable guinea pigs! Their stomachs can digest fresh produce and pellets, but processed sugary foods definitely not! When the cavies digest such sweet foods, they have tummy cramps, gasses, or even loose stool and diarrhea.


  • Stool changes – there is a lot of fiber in the Weetabix biscuits. They are in fact like digestive biscuits that work up the bowels and stomach for fast digestion. However, for the guinea pigs, excess of fiber can upset their stomach. This can lead to flatulence, stomach pains, gasses, softer stool or worst case scenario – diarrhea. Fibers in moderate amounts are crucial for a healthy gut of the guinea pig.

The Healthier Alternatives to Weetabix Biscuits

  • How do I give my guinea pig the fibers and nutrients that Weetabix has?

We mentioned how these biscuits have a lot of fiber, also carbs, proteins, some vitamins, and iron. You don’t need to risk it with Weetabix. There are plenty of other foods that your guinea pig can consume safely, and at the same time get the exact same benefits that Weetabix would offer. So, you need to research for foods that offer lots of vitamins, and a good amount of fiber, such as broccoli, asparagus, kale, peppers, squash…

Quick Facts on Weetabix

  • These biscuits are usually not eaten by themselves; they are too dry and crunchy, so they pair well with milk.
  • Weetabix is a UK brand.
  • The shape of these biscuits is like a small palm (9.5cm x 5cm).
  • Weetabix is exported to over 80 countries.
  • These biscuits were first produced in the UK in the year 1932.
  • ‘Weetabix’ is the UK version of the Australian ‘Weet-bix’ (of the 1920s).
  • There are also Weetabix Minis – they are a small, bite-size version of the regular biscuits, and it has various additions: chocolate, fruit & nut, banana, honey & nut.
  • ‘Weetabix’ also produces chocolate powder, mini-biscuit with chocolate chips, golden syrup biscuit, banana-flavored biscuit, and Weetabix gluten protein granules (in the shapes of biscuit and pipe shapes).

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.

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