Cucumber
Dogs and cats can eat cucumbers. They are rich in water and dietary fiber, which help maintain hydration and support digestion.

Cucumbers also contain essential nutrients such as vitamin C, vitamin K, and potassium, which support immune function, bone health, and blood pressure regulation. Since cucumbers are low in calories, they can be a healthy treat option and even assist with weight management. However, they should not replace your pet’s main diet — they are best served as an occasional snack.
Nutritional Benefits
Vitamin C
Strengthens the immune system and reduces free radicals with antioxidant effects. Plays a key role in collagen production and overall health.
Vitamin K
Essential for healthy blood clotting. Produced in the liver, it helps activate proteins needed for clotting. Also contributes to bone health by working with calcium to maintain bone density and structure.
Potassium
Supports heart health by maintaining a proper balance of sodium in the body. Helps prevent cardiovascular issues and supports normal muscle function.
Cucumber Seeds and Peel: Are They Safe?
Seeds
Cucumber seeds contain oxidized fatty acids and fiber, which can be difficult for pets to digest. Because they are small and hard, they may also cause gastrointestinal blockages. It is best not to feed seeds to dogs or cats.
Peel
The peel is difficult to digest and may cause digestive upset. It contains oxidized fatty acids and fiber, which can put extra strain on the digestive system. Peel the cucumber before feeding and serve only the soft, digestible parts in small amounts.
Recommended Serving Amount
Cucumbers should make up about 10% of your pet’s daily calorie intake. As a general guideline, feed 10–20 g of cucumber per 1 kg of body weight for dogs or cats.
Feeding Precautions
- Control the amount: Overfeeding can lead to digestive issues like diarrhea.
- Use fresh cucumbers: Old or contaminated cucumbers can harm your pet’s health and cause digestive problems.
- Remove the peel: Cucumber peel is hard to digest and should always be removed.
- Avoid mixing with sugary foods: Combining cucumbers with high-sugar foods (like fruits) may cause digestive problems.
- Avoid in certain conditions: Pets with diabetes, kidney disease, or cystitis should not eat cucumbers.
Does Cucumber Help With Bad Breath?
Cucumbers contain phenylalanine, a compound that can help reduce bad breath. However, cucumbers alone cannot completely eliminate it. Maintaining good oral hygiene — including adequate hydration, regular teeth cleaning, and the use of oral care products — is essential for preventing and managing bad breath.
Summary
Cucumber can be a hydrating, low-calorie treat for dogs and cats when fed properly. Peel and de-seed, serve small portions (about 10–20 g per kg body weight), and avoid use in pets with diabetes, kidney disease, or cystitis. Keep it as an occasional snack and maintain good oral hygiene for lasting breath benefits.