Mice are scared of a variety of things, including bright, flashing lights and loud noises. They have poor eyesight and rely on their sense of smell, and are repelled by the scent of cheese. Additionally, the scent of another animal, such as a cat, can sometimes scare mice away. Other smells that mice hate include peppermint oil, cinnamon, vinegar, citronella, ammonia, bleach, and mothballs. Mice are also scared of predators such as cats, dogs, foxes, weasels, lizards, snakes, and owls. However, its important to note that while these things may scare mice, they are intelligent creatures that can remember paths and avoid confrontation, making them tricky to catch.