Drowfing produces a powerful sleeping gas that is treasured by people suffering from insomnia. However, long-term exposure to the gas could cause them to be put into a coma.
Getting up close to a Drowfing will give you a chance to observe, through its thin skin, the toxic gases swirling inside. If your nose becomes itchy while you are sleeping, it's a sure sign that a Drowfing is standing above your pillow and trying to eat your dream through your nostrils.