The Scoop Behind Those Memes of Cats Grimacing at Stinky Smells

Mary Simpson
by Mary Simpson

They're funny, popular, and make us think cats share our disdain for all things funky smelling. But there's more to those images that you might imagine.

(photo credit: Pavlova Yuliia / shutterstock.com)

We’ve all seen them! Those funny clips of cats on social media where said feline is reacting – in a hilariously strong manner – to a smelly dog, stinky sock, or unappealing food item. And it’s that dramatic face of disgust that we’re all loving and taking to viral status.


But you might be surprised to learn that this behavior isn’t necessarily what you think it is. You see, FiFi isn’t scrunching up her face in disgust over something we as humans, agree is totally gross. It’s the opposite. She’s trying to draw in the chemical composition of this odor so she can then decide what to make of it.


Yes, that slightly open mouth with lips curled back is called the Flehman response. A German word that literally means curl of the upper lip. Which is exactly what it is. But it’s more - it’s a means of intra-species communication you will see in everything from cats and dogs to horses, goats, and wildlife in general. And it’s what they do to size up a perplexing situation.


The Flehman response involves inhaling through the mouth while closing off airflow into the nostrils. The air drawn in contains both pheromones from other animals as well as a mix of other scents and the entire purpose of this type of mouth inhalation is to direct the mix of multiple smells toward the vomeronasal organ (VNO) which is an olfactory-chemosensory organ in the roof of the animal’s mouth. You see, while the nose can pick up a wide range of scents, only the VNO can pick up and help kitty analyze the pheromones emitted from other animals.


So, that grimace we take as utter revulsion is actually her taking in as much of that “different” smell as she can. Now, once inhaled, any pheromones present will trigger nerve signals that instantly travel to the brain and control social behaviors. In short, what she does next.


If you’re wondering how all these pheromones become airborne, they’re secreted by glands located around the animal’s chin, cheeks, ears, paws, the area around their eyes, lips as well as the base of the tail and genitals. So, pretty much everywhere. Think of how often you’ve experienced your feline companion rubbing her face up against you, along the furniture, corners of the wall, etc. Yep, that’s how she marks her territory (meaning you!) and is able to leave a chemical communique that can be read by other animals who will in turn practice the Flehman response to pick up her message.


Mary Simpson
Mary Simpson

Sharing space with three seriously judgy Schnoodles and 2 felines who prefers to be left alone. #LivingMyBestLife

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