Vegetables can be consumed in many forms and still count toward the daily serving requirement. This includes 100 percent vegetable juice and raw, cooked, fresh, frozen or canned vegetables. One-half cup of vegetable juice or most raw vegetables equals one serving.
Pet mice will eat most kinds of vegetables, but they tend to enjoy crunchy ones more. Vegetables such as broccoli, carrots and celery contain a balance of vitamins, minerals and carbohydrates that are essential to keeping your pet mouse healthy. A piece of apple also serves as a healthy treat.
    Dont feed it cheese! Cheese is actually toxic to mice! if you are  feeding a wild mouse or keeping it as a pet, gather wild grasses  and seeds etc. You can also feed it sunflower seeds, bread, biscuit  crumbs, pet mouse food and other small animals pet foods, such as  guinea pig.