Do Mice Eat Grass? (Solved!)

Any mouse owner has probably noticed that mice seem to eat pretty much anything. But what about grass? Is this something a mouse can eat?

Mice are able to eat grass, and will do so if it is readily available in their environment. Mice are omnivorous, so they are able to eat a varied diet of which grass can be a feature.

Mice that live outside in the wild are regularly known to eat grass. They will also chew on certain wood barks and other mouse pleasing edibles.

Mice are very opportunistic and will eat all sorts of foods, it is a matter of survival. Mice are omnivorous, meaning that they have a very varied diet, which is a mix of meat, grains, vegetation, fruit and fresh water. [Source]

Mice that live indoors with you as pets prefer a high carb diet and will require more carbs, vegetables, some fruit and grains, as well as store-bought specialty foods. However, a mouse will never say no to a bit of boiled egg or a dried worm or two (and potentially some grass if there’s not much else on the menu that day!)

I’m going to take a good look at all the key bits of info about mice, grass, how they eat, how to influence what they eat, and a bit more as well. So, let’s take a look…

Brown mouse in grass

Mice Learn to Adapt to Their Environment

Mice are very adaptable, and that is why when an outdoor mouse invades your home, they are not too particular about what they eat. Your dropped crumbs and tidbits are a real treat to them. That is why a lot of people avoiding mice will ensure that food stocks are well sealed. 

They can bust into your grocery cupboard and enjoy the smorgasbord you might have on offer. Nibbling away on dried pasta, rice grains, flour, biscuits and all sorts of things. 

You are Probably Asking at this Point What to Feed Your Pet Mouse?

Having seen the wide variety of foods mentioned above, you are probably wondering which diet to feed your pet mouse? 

Simply because we love our pets so much, we always want the best for them. Most foods you can find at home in your cupboard. Just give those carrots a good wash, cut them up into smaller pieces and disburse the little bits all over his cage. He will love foraging and finding bits and pieces as he goes along. 

This is important, as mice are designed to forage for food. It keeps them busy, and also keeps them fit. You will rarely see an obese mouse. If you do, they will have either health problems or be quite elderly. 

Let’s Look at what makes a diet healthy for your mouse.

I am going to get to the nitty-gritty of what mice need to be healthy, and with this information, you will find feeding your pet mice not only fun, but also quite interesting too. 

Pet stores stock a lot of foods that are preprepared for mice. These types of kibble as they are often called, or mice muesli will cover most of their dietary needs.

 Included in these mixes are things like grains, rice and barley, as well as soy protein for starters. I know we can become quite eager when we have obtained our pet mice at first, and we might be tempted to feed them human treats. My advice is to pause for thought first. Many of what we see as human treats are toxic to our pets. 

Many store-bought foods contain a mix of seeds, pulses, grains and beans, and this is good for your mouse. They also have various kinds of presentations of the same types of foods. For example, the same ingredients can be compressed into blocks and given to your pets.

Some pet owners prefer these blocks, as it ensures their diet is more holistic. Meaning they cannot pick and choose which parts to nibble on, but instead nibble on the whole block. 

But, don’t feel sorry for your mouse. There are plenty of goodies and treats they can eat aside from their main meal, and with most of them being healthy, this isn’t a problem. 

Once you add fresh fruit, some veggies and other treats you will have the perfect mouse diet. 

Brown mouse on a log on the forest floor

Treats That Mice Love 

You might be shocked to hear that your mouse will love some types of dog biscuits. In fact, many kibbles contain these already, but nothing beats a good dog biscuit for a nibbly mouse. Mice will nibble on anything, and this includes wood barks of a certain kind. [Source}

In the world of mice, even curly kale is a treat! This is handy because kale is very nutritious for them. A nice juicy grape, some delicious strawberries and a dried worm thrown in is perfect heaven for a mouse. Whilst mice love some animal products to eat, pet mice do prefer a higher carbohydrate diet, and this includes a bit of dried pasta, for example. 

A mouse has a real need to nibble, no seriously, a real need.

To keep their teeth healthy and to please their constant need to nibble a bit of apple tree wood or any fruit tree wood is a crowd-pleaser when it comes to mice. Mice have a habit of chewing like crazy, that is why when a home is infested with mice, a telltale sign will be chew marks. 

This is very important to mice health. Their teeth, unlike ours, grow constantly and renew, so to keep them in order, they need to be filed down. Mice do this by chewing harder objects, like the wood mentioned above. 

As mentioned earlier, mice survive mostly on prepared kibble, which you can find at most pet supply shops, but you can make your own. If you are on a bit of a budget or just want to be more involved in your mice’s diet, then here are the simple principles of mice muesli. 

Mice Muesli 

Mice muesli is very easy to make, just throw in some rabbit or rat dried food, some dogs biscuits broken down, noodles, pasta, and a spot of breakfast cereal, and you are ready to go. 

Just be aware that there is not too much salt or sugar in their cereal. The easier ones are the ones without chocolate or other flavorings. Not only are these bad for your mouse, but mice have a super keen sense of smell, and they will find these types of ingredients abhorrent. A high sodium and sugar diet is a guarantee that your mouse will be overweight. 

Some Points to Remember When Creating a Foraging Situation

If you are encouraging foraging, ensure that their cages are kept clean and the food is not left to rot. Changing their litter often, if this is the case, is key. Most litter is inexpensive and can be replaced quite frequently. 

You can also make your litter out of kitchen paper towels. They are very absorbent and can also help to soak up moisture and smells to a point. 

Specialized litter is a bit fancier than that and can absorb smells more readily. You also do not want your mouse getting ill from eating old food left lying about. 

Not only do mice enjoy variety in taste, but also in texture. From the soft juicy strawberry to the brittle pasta, it gives them the satisfaction they love in each and every meal. 

Mice adore a mixture of foods, as we have discussed. Muesli will form the base of their foods, and then on top of that some vegetables and fruits. Plus they get to enjoy treats, here is where you have to be a bit more careful. 

Human Treats are Not Always Mice Treats!

Human treats that are delicious to humans are often very toxic for pets. Chocolate is one of them. Don’t be tempted to share sweets and chocolate. The high sugar content is very bad for them. Also, contrary to what a lot of people think, mice don’t really like cheese that much. 

They might eat some cheese, but the strong smell of cheese repulses them, and given a choice of kale to nibble on and cheese, they will choose the kale. Other foods that are bad for your mouse are onions, also because of their pungent smell. Potatoes and mashed potatoes, have been known to kill mice as it swells up in their tummies, causing them to choke. 

Some vegetables can be tolerated but in smaller amounts, so make sure you do not overload your mouse with a particular food this can cause tummy problems. 

As you can see finding out about what your pet can or can’t eat is the best route to go. Then to try these different ideas out on your pet mouse, which also has its ideas of what is tasty. 

This is all part of the fun of owning a pet and once your pet feels comfortable and trusting of you, you will find yourself being rewarded over and over again. 

Barry Gray

Barry is a freelance writer from Scotland. He has written about pets for over a decade, and his work has been turned into a range of ebooks, courses, and material for diplomas. Barry is passionate about all animals, but particularly dogs, fish, rabbits, birds and spiders. You can find out more about Barry at

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