Ferrero discovered that one of the 14 TAARs, TAAR4, detected the odor of several carnivores.
a kairomone, a chemical that works like a pheromone, except that it communicates between members of different species instead of members of the same species.
"One of the things that's really new here is that this is a generalized predator kairomone that's volatile," s
It's been known so long that predator odors are great rodent deterrents, but we've discovered one molecule that's a key part of this ecological relationship,