Blueberries are high in sugar and are not a normal part of a rabbits diet. Eating too many of them can cause diarrhea but feeding rabbits a small amount of blueberries as an occasional snack is ok. They are a great source of antioxidants but so is fresh green hay and whole oil seeds like flax.
Following these feeding recommendations will help your pet rabbit live a long and healthy life. They will feel healthier and will be more playful and you'll see a real difference in the quality of their fur coat.
So can rabbits eat blueberries? Yes but limit it to a very small snack!