Scott Conant is an American celebrity chef, cookbook author, and restaurateur. He is widely renowned for his three-star New York restaurants L'lmpero and Scarpetta. Similarly, he is also a judge on the Food Network's show Chopped.
As you can see blueberries have a hint of phosphorus, calcium, and fat and they have a little acid in them, however they are quite sweet as they contain a lot of sugar. So rabbits can eat blueberries but only in small amounts once a week at the most. One blueberry should suffice.
I used to use frozen wild blueberries and baby peas (because they are smaller than average size and don't choke the baby) to give to my kids when they were teething. Blueberries are, without question, the messier option! They loved rolling them around over their gums and gnawing at them.