Never use fireworks around pets! While exposure to lit fireworks can potentially result in severe burns and/or trauma to the face and paws of curious pets, even unused fireworks can pose a danger. Many types contain potentially toxic substances, including potassium nitrate, arsenic and other heavy metals. Loud, crowded fireworks displays are no fun for pets, so please resist the urge to take them to Independence Day festivities. Instead, keep your little guys safe from the noise in a quiet, sheltered and escape-proof area at home.