I wouldn't worry too much if she's a good eater. My dd self weaned from boob around 7months, we went to formula but by around 9months she would only drink 50-100mls of each bottle we were tipping out more than she was drinking. We talked to the health nurse and she advised that she probably wouldn't be getting a lot out of the little bit she actually drank, as long as she was eating well and gaining weight we could stop bottles. So she had her last bottle at 9/10 months and hasn't had any issues from it at all. Has only now become a big cows milk drinker but used to eat a lot of dairy.