Can dogs eat blueberries?
Safe. Yes. Blueberries have no known toxicity for dogs and at about 57 kcal per 100 g they make a small, low-calorie treat.
How much is dangerous?
No toxicity, so no threshold. Portion size is the only thing to manage.
Why it does harm
There is no toxic principle. Blueberries is on this list because owners ask about it, and the honest answer is that the risk is about calories, preparation or choking rather than poisoning.
Sources
What to look for
- None expected. A large amount may loosen the stool.
What to do
- Wash them and serve fresh or frozen.
- Count them toward the 10% treat allowance.
How much blueberries can a dog have?
Treats and extras should stay under about 10% of a dog's daily calories, so the complete food still supplies the nutrients. At about 57 kcal per 100 g, this is how much blueberries fills that allowance on its own for a typical neutered adult at a healthy weight:
| Dog weight | Daily treat allowance | Most blueberries per day |
|---|---|---|
| 10 lb | 35 kcal | 61 g (2.2 oz) |
| 25 lb | 69 kcal | 121 g (4.3 oz) |
| 50 lb | 116 kcal | 204 g (7.2 oz) |
| 75 lb | 158 kcal | 277 g (9.8 oz) |
| 100 lb | 196 kcal | 344 g (12.1 oz) |
If your dog gets other treats the same day, those share the allowance. Puppies and very active dogs need more calories overall; dogs on a diet need fewer.
How to serve it
- Fresh or frozen, washed, with nothing added.
- Not blueberry muffins or pastries, which add sugar and fat.
Dog Treat Calorie Budget Calculator → Dog treat calorie calculator: find your dog’s 10% treat allowance and how many of a given treat fit inside it without unbalancing the diet.
Common questions
Can dogs eat frozen blueberries?
Yes. Frozen blueberries are a good hot-weather treat. For a very small dog, let them thaw a little so they are easier to chew.