Can Pet Mice Eat Grapes – A Full Guide

As pet owners, it can sometimes be difficult to know what they should and shouldn’t eat.

This is even more the case for small pets like mice, who might not need to eat much of something dangerous to have some pretty bad reactions.

So it’s always worth checking whether your pet can eat a certain food before giving it to them.

In this article, I’m going to focus on grapes and mice. Can mice eat grapes and how often can you feed grapes to your mouse.

Mice can eat grapes. Grapes have lots of health benefits for mice. However, just like many fruits, there are health risks if eaten in excess so grapes should only be considered as an occasional treat for mice.

Grapes are actually toxic to some animals, including dogs, but they are perfectly safe for mice to eat.

First let’s look at the health benefits, then I’ll move on the risks and answer a few frequently asked questions such as how many grapes a mouse should eat.

The benefits of grapes for mice

Most fruits have health benefits for mice if eaten in moderation, grapes included.

Let’s run through some of the key nutrients packed into grapes and why they are good for the health of your mouse.

Vitamin C

Vitamin C is an antioxidant. That means it helps to protect the body from free radicals.

Free radicals are atoms that attach themselves to cells in the body. The body’s immune system then treats the cell as an invader and destroys it. 

Long term this can help to reduce inflammation and cognitive ageing.

Vitamin K

This is a fat-soluble vitamin that helps with blood clotting. It also aids bone metabolism and supports the regulation of blood calcium levels.

Vitamin B6

This B vitamin is responsible for glucose generation as well as supporting the proper function of red blood cells, the nervous system and the immune system.


The right amount of fiber can help to improve the digestive system.

Fiber gets fermented into fatty acids by bacteria in the intestine. In turn, those fatty acids help to prevent any excess of bad bacteria and reduces the exposure to any carcinogens your mouse has consumed.


Potassium is an important electrolyte, it helps to control nerve impulses, brain function, muscle activity, and heart function.

It also helps to promote muscle growth and works in conjunction with calcium and phosphorus to support healthy bones, teeth and fur.

The health risks of grapes for mice

Whilst there are plenty of health benefits mice can get from grapes, if they have too many too often they will certainly do more damage than good.

These effects are often enhanced for smaller pets like mice as overfeeding is quite easy to do.

Let’s take a look at why too many grapes can be harmful to mice.

Excess sugar

Grapes contain lots of natural sugar which can lead to weight gain when excess sugar is converted to fat.

Of course, this will often lead to negative health effects for your mouse. Conditions caused by excess weight can include heart disease and high blood pressure.

Increased weight can also put more pressure on the body as a whole, leading to quicker deterioration of muscles and limbs.

Excess fiber

Some fiber will be good for your mouse’s digestive system; however, problems can occur from ingesting excess amounts of fiber.

Too much fiber can cause diarrhea, as well as preventing the absorption of some vitamins and minerals.

Mice are omnivorous, eating a range of plant and animal based foods.

That means they don’t need as much fiber as some of their rodent relatives like rabbits, whose diets consist of extremely high fiber food.

Can mice eat raisins

Raisins are just dehydrated grapes and so they are safe for a mouse to eat.

But feeding your muse raisisns is more risky than feeding them grapes.

They are much smaller than grapes but essentially contain the same amount of sugar.

The sugar content is very concentrated, so it would be very easy for your mouse to far exceed it’s required sugar intake by eating raisins.

Don’t feed your mouse more than 1 or 2 raisins every few days otherwise, they may begin to gain excess weight.

Remember, mice should gain all the nutrients they need from good quality mouse food, so anything extra like raisins should be offered as the occasional treat rather than as part of their standard daily diet.

How many grapes can a mouse eat

Grapes have lots of health benefits for mice that we have discussed above.

But that doesn’t mean they can eat lots of them, the high sugar content will quickly outweigh any benefits.

Grapes should always be considered as a treat and only fed occasionally and is small quantities.

I would recommend giving your mouse no more than half a grape every few days.

It’s also a good idea to make sure they get plenty of exercise the same day, so they use that excess sugar as energy and it doesn’t convert to fat.

On days where you feed your mouse sugary treats like grapes, try to take them out of their cage and play with them for a while.

Can a mouse eat green grapes

Mice can eat green grapes.

Red grapes are thought to be marginally better than green grapes from a nutritional point of view but green grapes still have loads of beneficial nutrients.

Can a mouse eat red grapes

Mice can eat red grapes.

They have lots of nutritional benefits and get their color from disease-fighting antioxidants called flavonoids.

Red grapes contain more flavonoids than green grapes but otherwise, both are quite similar in terms of the health benefits.

Remember though, any benefits will be far outweighed by the excess sugar if you overfeed your mouse grapes, so just give them as an occasional treat.

Always feed your mouse new food with caution

Whilst most mice will be able to eat grapes in moderation without any problem, all mice are individual.

Some will have greater sensitivity to certain food and there’s always a potential for a certain food to cause digestive upset.

This is more often the case with older mice, but a mouse of any age might not take well to certain food.

If you’re feeding your mouse grapes or raisins for the first time always make sure you monitor them for the next day or so.

Look for signs of digestive issues, this is quite hard to spot in mice but diarrhea is the most obvious sign, or you might notice they are less active too.

If you see those symptoms you should stop feeding your mouse grapes and try an alternative treat.

If the symptoms persist you should consult with your vet.

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