Why?
Cucumber is about 95% water, with very few calories and a little fiber. It contains nothing known to be toxic to cats. It also gives a carnivore almost nothing it needs, so think of it as a refreshing snack rather than food.
How much?
Two or three small cubes now and then is plenty. Wash or peel it, scoop out the seeds if your cat has a sensitive stomach, and cut it small so it's easy to swallow.
The risks
- Soft stools or diarrhea if your cat eats too much
- Large chunks that are hard to swallow
- Pesticide residue on unwashed skin
- Pickles and tzatziki, which are salty, vinegary or garlicky
Your cat ate some: what now?
Don't worry: a bit of cucumber won't hurt your cat. A larger amount may cause soft stools for a day or two; call your vet if diarrhea lasts more than 48 hours. If it was tzatziki or a salad with garlic or onion, call your vet right away.
Better options
Zucchini and lettuce are other mild, watery options. To really keep your cat hydrated, wet food and a water fountain do far more.
Common questions
Why are cats scared of cucumbers?
The viral videos mostly show a cat startled by an object that appeared behind it while it was eating. It isn't about the cucumber itself, and pranking your cat this way can genuinely stress it out.
Can cats eat pickles?
No. Pickles are soaked in salt and vinegar and are often flavored with garlic. Keep them for yourself.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.