Can dogs eat cucumber skin?

Yes. Wash it well; peel it if it's waxed or your dog has a sensitive stomach.

Can dogs eat pickles?

It's best to avoid them. They contain salt and often garlic, onion and spices.

Are cucumbers good for overweight dogs?

They're a low-calorie swap for treats, used alongside a measured food plan.

Can puppies eat cucumber?

Yes, a few small slices, especially when teething, but keep complete puppy food as the main diet.

Can Dogs Eat Cucumbers? A Low-Calorie Treat

Yes, plain cucumber is a safe, very low-calorie snack for dogs, at about 15 kcal per 100 g. Wash it, slice it to a sensible size, skip pickles and seasoned cucumber salads, and use it as a swap for higher-calorie treats, especially for dogs that need to lose weight.

Cucumber is about 95% water, crunchy, cheap and easy to find. For dogs, it's one of the best "free" treats: a satisfying crunch for almost no calories. This guide explains the benefits, how to cut and serve it, how to use it in a weight-loss plan and why pickles are a different story. Check other foods in our food safety checker.

Is cucumber good for dogs?

Cucumber with the skin has roughly 15 kcal, 3.6 g of carbohydrate, 0.5 g of fiber and 95 g of water per 100 g. It also provides:

Vitamin K, which supports blood clotting.
Potassium and a little magnesium.
Small amounts of vitamin C.
Hydration, from the high water content.

Nutritionally it's modest. Its real value is in what it replaces: a dog that gets cucumber slices instead of a biscuit saves a lot of calories.

Cucumber for weight loss

Obesity is among the most common nutrition problems in pet dogs, and it shortens lives and worsens arthritis, breathing and heart problems. Treats are an easy place to cut calories without cutting affection.

Cucumber works well because:

It's low in calories, so you can give many pieces.
The crunch makes it feel like "real" food to many dogs.
It's cheap and widely available.

It doesn't replace a measured, complete and balanced diet, and dogs on a weight-loss plan should be fed to a calorie target set with your vet. See the dog food calculator for weight loss and check body condition with the dog BMI calculator.

How much cucumber can a dog eat?

Treats should stay around 10% of daily calories, but cucumber's calories are so low that the practical limit is stomach comfort. Too much can cause gas or loose stool.

Dog size	Weight	Portion
Toy	Under 10 lb (4.5 kg)	2-3 thin slices
Small	10-25 lb (4.5-11 kg)	4-6 slices
Medium	25-50 lb (11-23 kg)	6-10 slices
Large	50-90 lb (23-41 kg)	Up to a third of a cucumber, sliced
Giant	Over 90 lb (41 kg)	Up to half a cucumber, sliced

A 5 mm slice weighs about 5 g and has under 1 kcal.

Worked example: the biscuit swap

Meet Waffles, a neutered 12 kg (26 lb) dog on a weight-loss plan.

Target weight: 11 kg. RER at 11 kg: 70 × 11^0.75 = 70 × 6.04 = about 423 kcal a day for weight loss.
Current treats: three small biscuits at about 30 kcal each = 90 kcal, which is 21% of his daily allowance.
Swap: ten cucumber slices (about 50 g) = about 8 kcal.
Saving: 90 − 8 = about 82 kcal a day, which can go back into his meals so he isn't hungry.
Result: same amount of "treat feeling," far fewer calories.

Use the dog calorie calculator to set your own dog's target.

How to prepare and serve cucumber

Wash it. Cucumbers are often waxed. Peel if the wax is thick or your dog has a sensitive stomach.
Cut to size. Slices or sticks are safest. Whole chunks can choke small dogs.
Seeds are generally fine. Skip them only if your dog has a sensitive stomach.
Serve chilled or frozen for a summer treat. Frozen slices are a nice teething aid for puppies, under supervision.
Stuff into a lick mat with a little plain yogurt.

Pickles and seasoned cucumbers are different

Pickles are a poor choice for dogs:

Salt: pickle brine is high in sodium.
Garlic, onion and spices: often included in pickling, and toxic to dogs.
Vinegar and sugar: can upset stomachs.
Sugar-free pickles: may contain xylitol.

Skip pickle juice, cucumber salads with dressing, tzatziki (garlic and dairy) and sushi rolls. If your dog ate a pickle with garlic or onion, call your vet.

Who should be careful?

Dogs with sensitive stomachs: too much water and fiber can loosen stools.
Dogs with kidney disease: ask your vet about potassium and water.
Puppies: a few slices are fine alongside complete puppy food.
Dogs with food allergies: cucumber allergy is rare, but watch for itching.

When to call your vet

Call your vet if your dog has repeated vomiting, diarrhea for more than a day, or choking after eating cucumber. If your dog ate pickles with garlic or onion, or a sugar-free product, call as well. ASPCA Animal Poison Control Center: 888-426-4435. Pet Poison Helpline: 855-764-7661.