Dogs can eat blueberries. Blueberries are rich in a variety of nutrients, such as anthocyanins, vitamins C, E, K and a variety of mineral elements. Dogs can supplement nutrients that are not found in dog food. The pectin in blueberries can help dogs clean their intestines and balance the microorganisms in the intestines, so dogs are less likely to have diarrhea. The antioxidants in blueberries can help dogs resist free radical damage and protect cell health.

However, although blueberries are good for dogs, they should not be consumed in excess. Blueberries, as a fruit, contain a certain amount of water. The dog's gastrointestinal tract is relatively fragile. If you eat too much at one time, it may irritate the gastrointestinal tract, causing diarrhea, poor appetite and other problems. There is also a certain amount of sugar in blueberries. If your dog consumes too much, it may lead to obesity, diabetes and other problems. The fiber in blueberries may also cause gastrointestinal discomfort and diarrhea in dogs.