Can dogs eat cucumber?

Yes — a perfect low-calorie treat

Yes. Cucumber is one of the lowest-calorie treats you can give a dog and is particularly useful for overweight dogs.

The full picture

Cucumber is almost all water (about 96%) and virtually calorie-free, which makes it an ideal treat for overweight dogs or dogs on a diet. It's crunchy, refreshing, and safe for almost every dog. Most dogs enjoy it, though some are indifferent. Cut into appropriate-sized pieces to avoid choking. No preparation needed beyond washing. Avoid pickled cucumbers (too much salt and vinegar).

Risks to watch for

  • Choking if pieces too large for small dogs
  • Stomach upset if eaten in huge quantities

Potential benefits

  • Near-zero calories
  • Hydration
  • Vitamin K
  • Good for weight-loss diets

Safe portion size

Almost unlimited as a treat — small slices throughout the day are fine.

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Related foods

Carrots yes Celery yes Watermelon yes Pickles no
Written and reviewed by
The Can My Dog Eat editorial team

Every food page is cross-checked against UK veterinary sources including the Veterinary Poisons Information Service (VPIS), the Animal PoisonLine, PDSA, and the Merck Veterinary Manual before publication. We do not accept paid placements from brands. If you spot an inaccuracy, please let us know — we take errors seriously and correct them quickly.

Spot an error? Report it

Checked against UK veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the Animal PoisonLine on 01202 509000.

Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the Animal PoisonLine on 01202 509000 in the UK.