Generally, house mice are herbivores, and eat only fruits and grains. Sure, a mouse might eat small insects, but what about a big hefty cockroach? In the wild, mice will eat many smaller insects as they go about their day. Yet they are opportunistic, so they will eat whatever they can, including insects. Do mice eat insects? Do mice like cheese as much as they do in cartoons? Truthfully, mice will eat just about anything they can. The preferred meals of mice are grains, seeds, and fruit. However, if their preferred foods aren't available, they'll eat other foods, including meat, dairy, and insects. However, deer mice aren’t the ones that usually enter your home (though they do sometimes in the winter), so don’t count on this critter for pest control. Depending on the type of food they have put in hiding, this can lead to home invasions from other insects like cigarette beetles, saw-toothed grain beetles and weevils who all feed on seeds and grains. In addition to munching on seeds and fruit, deer mice eat beetles, caterpillars, grasshoppers, and leafhoppers. Common species such as the wood mice can find nutrition in vegetation such as seeds and fruits, as well as flower buds, mushrooms and other edible fungi. Learn more about mice eating habits and which foods they prefer. Some mice do eat insects! Mice are omnivorous, so they will eat both plants and meat. These rodents will also hunt small snails, centipedes, larvae, worms, and crickets to munch on and feed their appetite for protein. Apart form plant life, wood mice can also make a meal out of various insects, such as worms, centipedes and crickets, and can even eat snails. 1.877.837.6464 . Do mice eat roaches? Some mice will eat a range of substances.