How much blackberries for your dog?
Most guides say "a few pieces". Enter your dog's weight and get the actual daily ceiling, worked out from blackberries's calories and the 10%-of-daily-calories treat rule vets use.
Assumes a healthy, neutered adult at a stable weight, and that this is their only treat that day. Puppies, pregnant, very active or unwell pets need different amounts — ask your vet.
Why this verdict for dogs
Blackberries are safe and full of antioxidants and fibre. Sugary, so keep portions modest.
Blackberries are one of the better fruit treats you can offer a dog — low in sugar for a berry, high in fibre and antioxidants, and small enough to need no preparation at all.
How much is safe?
A few berries for a small dog, a small handful for a larger one, a couple of times a week. Like raspberries they contain trace natural xylitol, which is not a practical concern at treat portions but is a reason to keep servings modest. Cats may take one out of curiosity; it will not harm them.
What happens if a dog eats too much?
Fibre-driven diarrhoea and an upset stomach, and a temporarily alarming but harmless darkening of the stool.
How to serve it safely
Wash them well, especially wild-picked ones, and serve whole or lightly mashed for small dogs. Frozen works nicely. Avoid blackberry jam, pie filling and anything sweetened.
🐾 Make it a healthy treat
Frequently asked questions
Can my dog eat blackberries picked from a hedge?
The fruit itself is the same, so yes — but wash them, be sure of what the plant is, and be aware that roadside brambles may carry pesticide or exhaust residue. The thorny canes are also worth keeping a nose away from.
My dog's poop went black after berries — should I worry?
If they ate a good number of dark berries, that is likely the cause and it passes within a day. Genuinely black, tarry stool without that explanation means digested blood and needs a vet.
More fruits for dogs
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated July 31, 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List