Why are cats scared of cucumbers? And why you should not try it
Cats are not afraid of cucumbers as such: they get a fright because, while they are eating peacefully, an unfamiliar object suddenly appears behind them that was not there before. It is a startle reaction to a possible threat. Doing it to film them is no fun for the cat: it causes stress and can damage its sense of safety at home and around its food bowl.
The viral video
Around 2015, thousands of videos with the same script went viral online: a cat is eating calmly from its bowl, someone places a cucumber behind it without it noticing, the cat turns round, spots it and leaps into the air, sometimes more than a metre (3 ft), before bolting. The videos were shared millions of times and became a challenge. The obvious question they left was: why are cats so scared of cucumbers? The short answer is that it is not the cucumber. The same thing would have happened with a banana, a sock or a box that suddenly appeared at that moment. What makes the cat jump is not the object but the way it appears, and that changes how the videos should be read entirely: they do not show a funny fear, but a fright that was deliberately caused.
What is really going on
What those videos show is a startle: an automatic alarm reaction to something unexpected. The cat is eating, one of the moments when it feels safest and lets its guard down, usually in a familiar corner. Suddenly, as it turns round, it discovers an object very close behind it that was not there before, that it did not hear arrive and that it cannot identify. For an animal that is both predator and prey, something that appears silently behind it could be danger, and its body reacts before it thinks: it jumps well clear to gain distance and only then assesses the situation. It is the same mechanism that makes us jump if someone taps our shoulder in an empty house.
Does it look like a snake?
An explanation you hear a lot is that cats mistake the cucumber for a snake, because of its long shape and green colour. It is an appealing idea and some experts have mentioned it as a possibility, but there are no studies to prove it, and there are reasons to doubt it: cats that live in flats have never seen a snake, and the videos show similar reactions to other objects of very different shapes. What is clear is that the key lies in the surprise, the closeness and the moment chosen, far more than in the cucumber. It is wiser to stick with that explanation, which is the one most veterinary behaviourists give.
Why it is not funny
The cat does not find it funny at all. A fright like that sets off its stress response, with a surge of adrenaline and a state of alert that can last quite a while. As it flees, it can also crash into furniture, fall off a worktop or hurt itself. But the worst part is not the moment itself: it is what the cat learns. It may link its feeding spot, which should be one of the places it feels safest, with danger, and start eating anxiously, eating less or avoiding that corner. Some cats become more nervous in general, and in very sensitive cats a fright like that can trigger problems such as urine marking or stress-related cystitis.
Stress in cats is no laughing matter
Stress has real effects on a cat’s health. Feline idiopathic cystitis, one of the most common causes of urinary problems in young and adult cats, is closely linked to stress and changes in their surroundings. Stressed cats may stop using the litter tray, overgroom until they have bald patches, eat less or hide more. That is why feline welfare guidelines stress that a cat needs a predictable environment, with its key resources (food, water, litter tray, scratching post and hiding place) in quiet spots where nobody disturbs it. Deliberately frightening it at its food bowl goes in exactly the opposite direction.
If your cat has already had the fright
If your cat has been through something like this, or got a fright near where it eats, you can help it regain its confidence. Remove the object, put the food bowl somewhere quiet, with its back to a wall and a good view of the room, and make sure nobody approaches it from behind while it eats. For a few days, offer its favourite food and do not stare at it while it eats. If it still eats anxiously or has stopped eating normally, try moving the bowl somewhere else. And if it stops eating for more than 24 hours, see the vet: in cats, not eating for days is dangerous in itself.
Can cats eat cucumber?
Since cucumbers have come up, here is a common question: are they toxic to cats? No, cucumber is not toxic, and some cats nibble it out of curiosity, mostly because of its cool texture and high water content. But the cat is an obligate carnivore and does not need vegetables: its diet should be based on a complete cat food. If you want to give it a small piece of peeled, undressed cucumber as an occasional extra, that is fine, always in small amounts, with no salt, no vinegar and no garlic or onion, which are toxic. You can check other foods with Michipedia’s “Can my cat eat this?” tool.
Better videos instead
If you like filming your cat, there are plenty of ways to get funny videos without frightening it: playing with a feather wand, with boxes or tunnels, or teaching it simple tricks with treats, which many cats learn better than people think. Cats put on more than enough of a show just by being themselves. Other animal challenges also do the rounds on social media that rely on scaring or confusing them, such as invisible obstacles or sudden loud noises. The rule is simple: if the video only works because the cat is having a bad time, it is not worth filming or sharing.
Cats are not afraid of cucumbers: they get a fright because, while they are eating, an unfamiliar object suddenly appears behind them, and they react with a defensive startle. The snake theory has not been proven. Doing it to film them causes stress and can make them link their food bowl with danger. Cucumber, by the way, is not toxic.
Educational content from Michipedia, translated from the Spanish original. It does not replace the advice of a vet or a feline behaviour specialist. Every cat is an individual.