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Can Mice Eat Lettuce? What You Need to Know

Nicole Cosgrove

Do you have a pet mouse? Have you ever wondered whether or not it can eat human foods such as lettuce? The short answer is yes, mice can eat lettuce in moderation. In this article, we will discuss this topic in further detail, outlining how much, how often, and what kind of lettuce is appropriate. We will also discuss mouse nutritional needs, as well as appropriate treats and foods you absolutely should not give your pet mouse.divider-mouse

What Kind Lettuce Can Mice Eat and How Much?

Ultimately, mice should not eat too much lettuce. Why? It can give them indigestion and cause loose stools. However, they can have greens, including lettuce, in moderation. Avoid iceberg lettuce because it provides little to no nutritional value. Opt instead for nutritionally rich options such as romaine, red leaf, or arugula. Lettuce is an excellent source of magnesium, folate, vitamin A, and vitamin C, which are all essential nutrients your mouse needs to stay healthy.

But how much should you offer? Mice need to eat a nutritionally complete diet, such as specially formulated pellets, in order to stay healthy. Even though lettuce can provide some nutritional value, it should be viewed as a treat only. Treats should make up no more than 10% of your mouse’s diet. Later in this article, we will discuss other appropriate treats for mice. Make sure to switch up your mouse’s treats so that it gets a variety of foods in its diet.

Nutritional Requirements for Mice

Like humans, mice are omnivores, which means they can eat a variety of plants and animal proteins. As a baseline, you should make sure to give your mouse pellet food that is specifically formulated for mice. While you might find rodent foods that are made for other species in addition to mice, such as gerbils or rats, the nutritional needs of other species are not exactly the same. Pellets or blocks are the easiest options because they contain all the essential vitamins your mouse requires. As an added bonus, they can help keep your mouse’s teeth from growing too long.

How Much Should You Feed Your Mouse?

An adult mouse will eat about 100 calories’ worth of food per day. The exact amount of food your mouse needs will depend on its age and activity level. Instead of filling your mouse’s bowl to the top, it’s a good idea to only give your mouse the amount of food it needs each day. This will help prevent the pellets from getting stale, as well as preventing your mouse from overeating.

Other Healthy Treats

In addition to lettuce, there are several other fresh fruits and vegetables that make excellent treats for mice. For vegetables, look for leafy greens, bok choy, broccoli, corn, peas, brussels sprouts, cabbage, carrots, endive, or tomatoes. Celery is also a great snack, but avoid giving your mouse too much; like iceberg lettuce, it doesn’t offer much nutritional value and can fill a mouse up easily. In terms of fruits, bananas, peaches, apples, plums, oranges, peaches, melons, and berries are all great options.

Other great treats to consider are pasta, cereals, fresh or dry mealworms, boiled eggs, milled seed spray, or even dog biscuits. These snacks can offer your mouse plenty of nutritional benefits but remember that they should not replace the main course.

Foods to Avoid

Your mouse is likely to eat just about anything it can get its hands on, but there are some foods that are not good for mice to eat. Chocolate, avocados, onions, garlic, tea, coffee, and alcohol are considered to be toxic to mice and should never be offered. But what about dairy? While you are likely very familiar with cartoon mice eating blocks of swiss cheese, it’s best to avoid giving it to your pet. While it isn’t toxic, cheese and similar dairy products do not provide any nutritional benefit for mice.

When feeding your mouse some of the healthy treats listed above, make sure the fruits and vegetables are fresh or steamed, not sauteed in oils or heavily salted or spiced. Apple and pear seeds contain cyanide, so it’s important to make sure all seeds are removed before offering fruit to your little friend.

Image Credit: Pixabay

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Final Thoughts

Lettuce is safe for mice in small amounts, but make sure it isn’t the only treat you are offering your pet. Like humans, mice need to eat a variety of foods to get the most nutritional benefit, so switch things up to keep your pet mouse healthy and happy.


Featured Image Credit: VH-studio, Shutterstock

Nicole Cosgrove

Nicole is the proud mom of Baby, a Burmese cat and Rosa, a New Zealand Huntaway. A Canadian expat, Nicole now lives on a lush forest property with her Kiwi husband in New Zealand. She has a strong love for all animals of all shapes and sizes (and particularly loves a good interspecies friendship) and wants to share her animal knowledge and other experts' knowledge with pet lovers across the globe.