from the dog health hub
Can Dogs Eat Kale? A Little Is Fine, a Lot Is Not
It depends. A small amount of plain kale now and then is fine for most healthy dogs, and it is dense in vitamins K, A and C. But kale carries both oxalates, which matter for dogs prone to bladder stones or kidney issues, and isothiocyanates, which can irritate the gut in quantity. It earns its superfood label for humans more than for dogs.
Why the caveats matter
Kale is nutritionally dense: vitamins K, A and C, calcium, and antioxidant compounds. In small amounts it is a perfectly acceptable green extra for a healthy dog. The reasons vets hedge on it come down to two compounds. Calcium oxalate can contribute to urinary crystals and stones in susceptible dogs, so dogs with a history of stones or kidney disease should not have kale at all.
The second is the isothiocyanate group, the pungent compounds crucifers are known for. In modest amounts they are harmless and possibly beneficial; in larger, regular servings they can cause gastric irritation, wind and diarrhoea. There is also a theoretical thyroid consideration with very large, sustained intakes of raw crucifers, which is another reason kale works as an occasional garnish rather than a daily bowl.
How to serve it safely
- Lightly steam it and chop it finely. Raw kale is tough, hard to digest and more irritating to the gut.
- Remove the thick woody stems; they are a chewing and choking nuisance and hold the least nutrition.
- Serve it plain. No oil, salt, garlic or dressing, and no kale crisps, which are usually oiled and salted.
- Portion sense: a teaspoon of chopped cooked kale for a small dog, a tablespoon for a large dog, once or twice a week at most.
- Skip kale entirely for dogs with a history of bladder stones, urinary crystals, kidney disease or thyroid problems, unless your vet says otherwise.
When to ring the vet
ring your vet if
Wind, gurgling or loose stools within a day · Vomiting after larger amounts · Straining to wee or blood-tinged urine in stone-prone dogs (vet visit needed) · Itching or ear flare-ups if kale is a new regular addition, as with any new food
Frequently Asked Questions
Is kale a superfood for dogs like it is for people?
Not really. A dog on a complete diet already gets the nutrients kale offers, so it adds variety and fibre rather than filling a gap. It is a reasonable occasional extra, not a health upgrade.
Can dogs eat kale crisps or massaged kale salad?
Best not. Kale crisps are typically coated in oil and salt, and salads bring dressings, garlic, onion and sometimes raisins. If you want to share kale, share it plain and lightly steamed.
Why do some dog foods contain kale if it needs caution?
Commercial recipes use small, controlled inclusions where the oxalate contribution is trivial within a balanced formula. The caution here is about generous home servings, especially for dogs already prone to urinary stones.
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See the multipack →This article is for information, not diagnosis. If your dog has eaten something worrying, ring your vet or, out of hours, an emergency vet. Every dog is different, and your vet knows yours.