Can dogs eat kale?
Maybe — kale is extremely nutrient-dense but contains calcium oxalate (which can cause kidney and bladder stones) and isothiocyanates (which can cause gastric irritation). Small amounts are fine for healthy dogs, but it shouldn't be a regular addition to their diet.
Vegetables · 49 kcal per 100 g
Benefits and risks
Benefits
- Exceptionally high in vitamins A, C, and K
- Contains powerful antioxidants including quercetin and kaempferol
- Good source of calcium, iron, and manganese
- Anti-inflammatory and potential cancer-preventive properties
- Low in calories — about 49 kcal per 100 g
Risks
- Contains calcium oxalate — can contribute to kidney and bladder stones
- Contains isothiocyanates — can cause gastric irritation in larger amounts
- Can interfere with thyroid function if fed in large quantities over time
- Tough, fibrous leaves can be hard to digest raw
Recommended serving size
Adjust portions based on your dog's weight, age, and activity level. Treats and snacks should make up no more than 10% of daily calories.
| Dog size | Weight range | Serving |
|---|---|---|
| Small dog | Under 20 lbs (9 kg) | 1 teaspoon, cooked and chopped |
| Medium dog | 20–50 lbs (9–23 kg) | 1 tablespoon, cooked and chopped |
| Large dog | Over 50 lbs (23 kg) | 2 tablespoons, cooked and chopped |
How to prepare and serve
Preparation
Steam or blanch kale to reduce oxalate content and make it easier to digest. Chop finely or blend into food. Remove tough stems, which are difficult for dogs to chew and digest. Never serve kale chips made with oil, garlic, or seasoning. Raw kale is safe in very small amounts but harder on the stomach. Do not feed kale to dogs with kidney disease or thyroid conditions.
Frequency
Once a week at most, in very small amounts.
Key nutrients
- Vitamin A
- Vitamin C
- Vitamin K
- Calcium
- Iron
- Antioxidants
Frequently Asked Questions
- Kale falls into a gray area — it's not toxic, but it's not entirely without risk either. In small, occasional amounts, kale is safe for healthy dogs and provides excellent nutrition. The concerns are the calcium oxalate content (which can contribute to kidney and bladder stones over time) and isothiocyanates (which can cause stomach upset in larger doses). Dogs with pre-existing kidney disease, bladder stone history, or thyroid conditions should avoid kale entirely. For healthy dogs, a small serving once a week is generally considered safe by most veterinarians.
- Kale is classified as a goitrogenic food, meaning it contains compounds that can interfere with thyroid hormone production when consumed in large quantities over extended periods. The isothiocyanates and thiocyanates in kale can inhibit iodine uptake by the thyroid gland, potentially leading to hypothyroidism. In practice, a dog would need to eat large amounts of kale regularly for this to be a real concern. Occasional small servings are unlikely to affect thyroid function in healthy dogs. However, dogs already diagnosed with hypothyroidism should avoid kale and other cruciferous vegetables as a precaution.
- If you want to add leafy greens to your dog's diet without kale's oxalate and isothiocyanate concerns, several alternatives are safer for regular feeding. Green beans are the gold standard — nutrient-rich, low-calorie, and safe in generous portions. Romaine lettuce provides hydration and mild nutrition with virtually no risks. Zucchini is exceptionally gentle on the stomach. Cooked sweet potato offers similar beta-carotene without oxalate concerns. Carrots provide comparable vitamin A with added dental benefits. These vegetables can all be fed more frequently and in larger portions than kale.
Related vegetables
Asparagus
CautionNot toxic, but tough to eat raw and loses most nutritional value when cooked soft enough for dogs to digest.
Beets
CautionCooked beets are safe in small amounts, but high in sugar and oxalates. Avoid for dogs with kidney issues.
Bell Peppers
SafeAll colors of bell pepper are safe — red has the most nutrition. Avoid hot peppers entirely.
Broccoli
CautionNutritious in small amounts, but florets contain isothiocyanates that can cause gastric irritation if overfed.
Browse all dog-safe foods
DogDataHub covers 100+ foods with clear safety verdicts, serving sizes, and prep tips.
See all foods