Can Cats Eat Blackberries?
By Pettings · Sources checked Nov 2, 2026
Cats can eat small amounts of plain fresh blackberries. The fruit is not on the ASPCA list of people foods to avoid, but cats do not need it. According to the Cornell Feline Health Center, cats are obligate carnivores that depend on nutrients found only in animal products.
What Blackberries Offer a Cat
Blackberries are mostly water with natural sugar and plenty of fiber, much of it in the small seeds. A complete cat food already supplies everything an adult cat requires, so a berry does not fill any gap. Fiber does have a place in some veterinary diets, and the Cornell Feline Health Center mentions added fiber as one way vets manage constipation, but that is a decision for your veterinarian and not a reason to feed fruit.
Cats also miss out on the flavor most people enjoy. A study published in PLOS Genetics in 2005 found that cats likely lack a working sweet taste receptor, so the sugar in a blackberry probably does not register as sweet.
How Much Blackberries Can a Cat Have?
A 10-pound adult cat with no food allergy and no health problems can have one or two blackberries cut into small pieces. That is only a few calories. WSAVA advises keeping treats under 10% of a cat's daily calories, which works out to about 22 to 25 treat calories a day for an adult cat of roughly 9 to 11 pounds. A couple of berries fit easily, and they should replace a little of that day's food, not sit on top of it.
Larger amounts can bring on loose stool because of the fiber and seeds. If your cat is a kitten or a senior, or has diabetes, kidney disease, urinary stones, pancreatitis or a food allergy, ask your veterinarian first.
How to Serve It
Wash the berries well and cut each one into quarters. Blackberries are large enough that a cat could try to swallow one whole, so small pieces matter. Fresh or thawed frozen berries both work as long as nothing has been added.
Do not share blackberry cobbler, jam, muffins, smoothies or flavored yogurt. These carry sugar, butter, dairy or sweeteners, and the ASPCA warns that xylitol, found in some sugar-free foods, is a problem for pets. Wild blackberries picked near roads or sprayed areas are also best left alone.
Try a single piece first and check the litter box over the next day. If your cat shows no interest, let it go.
If your cat has a medical condition or eats a special diet, ask your veterinarian before offering blackberries.
Common Questions
Are blackberries good for cats with constipation?
Blackberries are not a treatment for constipation. The Cornell Feline Health Center says vets often manage constipation by adding soluble or insoluble fiber, but too much soluble fiber can make stools overly liquid, and the right type and amount depends on the cat. A constipated cat should see a veterinarian, especially if the problem keeps coming back, rather than being given fruit at home.
Can cats eat blackberry leaves?
There is no reason to let a cat chew on blackberry canes or leaves. The plants have thorns that can injure a mouth or paw, and garden plants may have been sprayed. If your cat chewed a plant and you are not sure what it was, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 for advice.
Can kittens eat blackberries?
It is best to skip blackberries for kittens. A kitten needs a complete kitten food to grow, and its small stomach has little room for extras. The Cornell Feline Health Center notes kittens may be at higher risk of diarrhea as their digestive systems adjust to solid food. If you want to give a kitten any human food, check with your veterinarian first.
Can cats eat blackberries every day?
One or two blackberries can fit into a daily treat allowance, but daily fruit is not needed. WSAVA advises keeping treats under 10% of a cat's daily calories, about 22 to 25 calories for an average adult cat. Using that allowance on fruit means less room for treats your cat may actually enjoy, such as a small piece of plain cooked chicken. Keep it occasional and small.
Why does my cat eat blackberries?
Most cats that eat a blackberry are curious about the texture or want what their owner is eating. They are not chasing sweetness. A 2005 study in PLOS Genetics found that one of the genes for the sweet taste receptor is not expressed in cats, so they likely lack a functioning receptor. If your cat seems eager for fruit, a tiny piece now and then is fine, but meat-based treats suit a cat better.