Does it really work?..................
YRMV. Have been proactive on feeding mice and rats all the treated alfalfa they want on a periodic basis. Former time spent in Livermore and similar dry climates raises one’s awareness of Hantavirus vectors.
The anecdotal reports tout the essential oil extract as an irritant which repels rodents. That is why the post was written as an informative question. The peppermint oil is inexpensive and has the added factor of non-toxicity.