Feeding your pet mouse a balanced diet is essential for its health and longevity. Mice are omnivores with specific nutritional needs that differ from other small pets. A proper diet supports their high metabolism and prevents obesity, dental issues, and other health problems.
Our editorial team emphasizes that understanding what pet mice eat helps you provide optimal care. In the wild, mice eat seeds, grains, insects, and vegetation. As pets, they thrive on a varied diet that mimics these natural foods while avoiding harmful items.
Staple Diet for Pet Mice
The foundation of a pet mouse’s diet is a high quality commercial mouse or rat pellet. These pellets are formulated to provide complete nutrition, including protein, fiber, and essential vitamins. Avoid seed mixes as primary food, since mice often pick out high fat seeds and ignore balanced pellets, leading to obesity and deficiencies.
Pellets should make up about 75 percent of the daily food intake. Offer them in a heavy ceramic bowl to prevent tipping. Always provide fresh, clean water from a sipper bottle, not a bowl, to keep it clean.
Fresh Foods and Treats
Supplement pellets with small amounts of fresh vegetables and fruits daily. Safe choices include broccoli, carrots, cucumber, apple (without seeds), and berries. Introduce new foods one at a time to monitor for digestive upset. Remove uneaten fresh food after a few hours to prevent spoilage.
Occasional protein sources are beneficial, especially for breeding or young mice. Offer cooked egg, mealworms, or a small piece of cooked chicken once or twice a week. Avoid sugary treats and fatty seeds like sunflower seeds except as rare rewards.
Foods to Avoid
Several common foods are toxic or harmful to mice. Never feed chocolate, caffeine, alcohol, raw beans, raw potato, onion, garlic, citrus fruits, or rhubarb. Also avoid sugary human snacks, salty foods, and anything with xylitol (a sweetener toxic to many animals).
Dairy products can cause diarrhea in mice due to lactose intolerance. Stick to plain water and avoid milk or yogurt. If you offer cheese, use only a tiny amount of low lactose cheese very rarely.
Feeding Schedule and Portion Control
Mice have fast metabolisms and should have access to pellets at all times, but portion control is important to prevent obesity. A typical adult mouse eats about 5 to 7 grams of pellets per day. Adjust based on activity level and body condition.
Offer fresh foods in small portions, about a teaspoon per mouse per day. Feed treats sparingly, no more than a few times per week. Monitor your mouse’s weight weekly by gently feeling its ribs; they should be easily felt but not visible.