Can Dogs Eat Blueberries? Fresh, Frozen and How Many Are Safe

Last updated: November 2026

Can dogs eat blueberries?

Yes. Blueberries are not toxic to dogs, and every major veterinary and pet nutrition source we checked says they are safe in moderation. The American Kennel Club calls them low-calorie berries that provide fiber, vitamin C and antioxidants, and says most dogs enjoy them fresh or frozen. Purina puts it simply: unlike grapes, this berry poses no risk to your pup.

That grape comparison matters. Blueberries and grapes can sit side by side in a fruit bowl, but grapes and raisins can lead to kidney damage in dogs, according to the ASPCA. If you are ever unsure about a fruit, our guide to foods dogs can’t eat lists the ones that should never reach the dog bowl.

What makes blueberries such an easy treat is their size and calorie count. USDA data puts 50 raw blueberries at about 68 grams and 39 calories, so a single berry is roughly 1.4 grams and less than 1 calorie. You can hand out a few at a time without blowing your dog’s daily calorie budget.

Blueberries still come with a few cautions, and nearly every problem falls into one of these groups:

• Size and shape. Small, round berries can be a choking risk for very small dogs and dogs who gulp.
• Quantity. Too many at once can cause gas, soft stool, diarrhea or vomiting.
• Added ingredients. Muffins, pie, flavored yogurt, jam and canned or syrup-packed berries add sugar, fat or even xylitol.
• Health conditions. Dogs with diabetes or on prescription diets should get a vet’s okay first.

The rest of this guide covers each of those, with serving amounts by weight and what to do if your dog helps itself to a whole carton.

Are blueberries good for dogs?

Blueberries are a nutritious snack, but it helps to keep the claims in proportion. Your dog is eating a handful of berries, not a bowl, so the nutrients are a small bonus on top of a complete and balanced dog food. Here is what USDA FoodData Central reports for raw blueberries.

The quarter-cup and per-berry figures are our math from the USDA values: one cup is 148 grams and 84 calories, and 50 berries weigh 68 grams. Berry size varies a lot, so treat them as estimates. Tufts University’s Petfoodology team lands in the same place, listing 20 blueberries (25 grams) at about 15 calories.

Beyond calories, PetMD lists vitamin C, vitamin A, vitamin K, calcium, phosphorus, potassium and magnesium among the nutrients in blueberries, and Chewy notes the fruit is about 85% water. Purina adds that the fiber and vitamins C and K support the immune system and overall health.

The antioxidant story is where blueberries get the most attention. The AKC says research suggests antioxidants may help reduce the effects of brain aging in dogs. The best dog-specific blueberry study we found is small. Researchers at the University of Alaska Fairbanks fed sled dogs a diet in which blueberries made up 2% of daily food for two months. The blueberry-fed dogs had significantly higher antioxidant levels in their blood right after exercise, but the berries did not reduce the mild muscle damage from the workout, and the boost was not seen 24 or 48 hours later.

So the fair summary is this: blueberries are a healthy, low-calorie treat that may offer some antioxidant support, but they are not medicine. For another low-calorie option, carrots are a crunchy favorite, and our guide to whether dogs can eat carrots covers raw, frozen and baby carrots.

How many blueberries can a dog eat by weight?

Blueberries count as treats, and treats of any kind should stay under 10% of your dog’s daily calories. The AKC, PetMD, Chewy and Tufts all use that rule, and Purina’s nutrition team says it applies even to healthy snacks.

“Treats should make up no more than ten percent of your dog’s daily calories – even if the treats are a low-calorie and healthy option like blueberries.”

Jan Dempsey, senior nutritionist, Purina, quoted at Purina (2026)

The table below estimates the 10% treat budget for healthy, neutered adult dogs using the AAHA formula (resting energy times 1.4), then shows how many blueberries, at about 0.8 calories each, would use up that entire budget. The last column is the much smaller daily serving that PetMD and Chewy publish.

The middle column is a ceiling, not a target. It assumes blueberries are the only treat your dog gets all day, and a few cups of fruit at once is a recipe for an upset stomach. The PetMD and Chewy chart is far more conservative, and it is a sensible daily starting point. The AKC gives similar guidance, saying small dogs may only need 2 to 3 blueberries while larger dogs can have several more.

Calorie needs also vary. Active, intact and young dogs burn more, while seniors and less active dogs burn less, so adjust to your dog’s body condition. Our guide to bananas for dogs uses the same treat budget, which helps if you like to rotate fruits.

How do you serve blueberries to a dog safely?

Blueberries are one of the easiest fruits to prepare, because there is nothing to peel, pit or core. A minute of prep still makes a difference, especially for small dogs.

Wash them first

The AKC recommends washing blueberries thoroughly to remove dirt, bacteria or pesticide residue, and PetMD suggests rinsing them under cool running water. Chewy notes that conventionally grown blueberries can carry pesticide or chemical residues that may irritate a dog’s stomach, and the veterinarian it interviewed, Dr. Deborah Bayazit, prefers organic berries when possible. Either way, washing is the step that matters most. Pull off any stems while you rinse, which PetMD recommends especially for small dogs.

Size them for your dog

This is the step that prevents choking. The AKC says the size and shape of blueberries can pose a choking risk, particularly for very small dogs, and suggests cutting them in half for tiny breeds. PetMD and Chewy both recommend halving or mashing berries for small dogs and for dogs who gulp their treats without chewing.

A practical way to think about it: the smaller the dog, the bigger a whole blueberry is by comparison. For toy breeds, young puppies and fast eaters, halve every berry or mash them. For medium and large dogs who chew normally, whole berries are usually fine. Hand them out one at a time instead of tossing a handful, so your dog does not inhale several at once.

Fresh or frozen

Both are good choices. PetMD says fresh and frozen blueberries are generally the best options because they contain no added sugars or artificial ingredients, and the AKC calls frozen berries safe and refreshing. Purina’s Jan Dempsey says freezing a fruit gives your dog variety because it changes the texture. Buy plain frozen blueberries with nothing on the ingredient list except blueberries, and avoid bags labeled “in syrup” or “sweetened.”

Frozen berries are firm, so the same sizing rule applies. Small dogs do better with frozen berries that have been halved, mashed or allowed to soften for a few minutes.

Start small

The first time, offer one or two berries and watch your dog for the next day. Signs that a new food did not agree with your dog include gas, soft stool, diarrhea and vomiting. Chewy reports that Dr. Bayazit sees very few dogs with a true blueberry allergy, but any new food can upset a sensitive stomach. Add only one new food at a time, so you know what caused a problem if one appears.

Easy ways to serve them

• One at a time as a reward. Chewy suggests blueberries as training treats for dogs who love them. They are low in calories, so they fit between higher-value rewards. Our roundup of the best dog training treats covers store-bought options if you want both.
• Sprinkled on dinner. Purina and Chewy both suggest scattering a few berries over your dog’s regular food.
• Mashed into a topper. PetMD suggests mashing berries and mixing a small amount into the bowl.
• Stuffed in a toy or frozen into cubes. PetMD suggests blending blueberries with dog-safe fruit such as bananas or strawberries and plain, sugar-free, xylitol-free yogurt, then freezing it in ice cube trays, spreading it on a lick mat or packing it into a stuffed toy.

Blueberries also pair well with other dog-safe fruits. A few chopped pieces of apple with the core and seeds removed, as explained in our guide to whether dogs can eat apples, make a simple fruit mix. Whatever you combine, count all of it toward the same 10% treat budget.

Are dried and wild blueberries safe for dogs?

Both can be, with a few cautions.

Dried blueberries. PetMD says dogs can eat dried blueberries if they contain no added sugar, preservatives or other harmful ingredients, and suggests feeding smaller portions than fresh, because drying concentrates the natural sugars. The catch is that most store-bought dried blueberries are sweetened. USDA FoodData Central lists sweetened dried blueberries at 317 calories and 67.5 grams of sugar per 100 grams. That is more than five times the calories and nearly seven times the sugar of the same weight of fresh berries, which have 57 calories and about 10 grams of sugar.

Dried fruit is also easy to overfeed, because it is small and dense. If you want a dried option, unsweetened homemade berries in tiny amounts are the safest route. Our guide to whether dogs can eat cranberries covers a similar problem with sweetened dried cranberries.

Wild blueberries. PetMD says wild blueberries are also safe for dogs, but dogs should not eat large quantities and you should be certain the berries are correctly identified. Wild lowbush blueberries, the kind harvested in Maine and eastern Canada, are smaller and darker than supermarket berries. Kansas State University Research and Extension notes that cultivated blueberries are two to three times larger than wild ones. Their smaller size can actually make them easier for small dogs, but the same calorie and quantity limits apply.

The bigger risk on a hike is a different berry. Not every small blue or black berry is a blueberry, and dogs do not check. If your dog eats berries you cannot identify, take a photo or a sample and call your vet or a pet poison hotline.

Can dogs eat blueberry muffins, pie, yogurt or jam?

It is best not to share them. Plain blueberries are safe, but most blueberry foods made for people bring extra sugar, fat and sometimes dangerous sweeteners.

Blueberry muffins and pancakes. PetMD says blueberry muffins are not recommended because they often contain added sugar, fats and ingredients that may be toxic to dogs. Chewy adds that sugar-free muffins may be sweetened with xylitol.

Blueberry pie and pie filling. PetMD and Chewy both say to avoid pie filling and canned or syrup-packed blueberries, which carry excessive sugar and may contain sweeteners or preservatives. The crust adds butter and flour your dog does not need.

Blueberry yogurt. PetMD says most blueberry yogurts are not recommended because they often contain added sugars or artificial sweeteners such as xylitol. Even plain dairy can cause trouble, since the ASPCA notes pets do not make much lactase, so milk products can cause diarrhea. If you use yogurt in a frozen treat, choose plain, unsweetened and xylitol-free, and keep it to a spoonful.

Blueberry jam and syrup. Regular jam is mostly sugar, and “sugar-free” or “low sugar” versions are exactly where xylitol tends to appear. The FDA advises checking the label for xylitol, especially on products advertised as sugar-free or low sugar. It also lists baked goods, including muffins and pies, among the foods that may contain it.

The same goes for peanut butter, a common partner for frozen blueberry treats. Our guide to peanut butter for dogs explains what to look for on the jar.

Can puppies and dogs with diabetes eat blueberries?

Puppies. Yes, in small amounts. The AKC says puppies can eat blueberries in moderation, as long as they are introduced gradually and sized to prevent choking. PetMD agrees, provided the berries are prepared appropriately and fed in age-appropriate portions. For a young puppy, a halved or mashed berry is plenty to start, and a balanced puppy food should always come first.

Dogs with diabetes or other conditions. Check with your vet first. PetMD says dogs with diabetes, certain food sensitivities or medical conditions that require prescription diets should generally avoid high-sugar fruits unless a veterinarian approves them. Blueberries are lower in sugar than many fruits, at about 0.14 grams per berry by USDA numbers, so many vets may be comfortable with a few. Only your vet can say whether they fit your dog’s plan. Our guide to diabetes in dogs covers daily feeding in more detail.

If your dog has diet rules, make sure anyone who finds them knows too. In the free Lohji app (App Store, Google Play), you can add medical and behavior notes to your dog’s Smart Tag profile, along with up to three contacts a finder can call, text or map in one tap and up to three short voice messages from you. Lohji also turns one photo of your dog into a cartoon character for stickers and wallpapers, including a “Hungry” sticker for the dog who stares down every bowl of berries.

What should you do if your dog ate a lot of blueberries?

Usually, stay calm and watch. Blueberries are not toxic, so a dog who raids a carton is most likely facing an upset stomach, not an emergency. Chewy lists the signs that a dog ate too many: diarrhea, vomiting, decreased appetite, discomfort and excessive lip licking.

Here is a simple plan:

1. Figure out how much is missing and whether anything else was eaten, such as the plastic clamshell, muffins, pie or yogurt.
2. Read the label of any blueberry product. Look for xylitol (birch sugar), raisins, chocolate or macadamia nuts.
3. Offer fresh water and skip treats for the rest of the day.
4. Watch for vomiting, diarrhea, belly pain, weakness or not eating over the next 24 hours.

If xylitol was involved, do not wait for signs. The FDA says to take your dog to a vet or emergency animal hospital immediately, because serious effects may be delayed up to 12 to 24 hours. Call your vet or ASPCA Animal Poison Control at (888) 426-4435, and have the package handy.

For plain blueberries, call your vet if vomiting or diarrhea is severe, keeps going, or shows blood, or if your dog seems weak. Chewy also advises calling your vet right away whenever you suspect your pet is sick.

And if your dog is ever struggling to breathe after gulping berries, treat it as an emergency and get to the nearest vet right away.

Frequently asked questions