My baby was tested for lactose intolerance around 6 weeks old, and a sample of fresh pooh was taken (ie, she caught it in a cup) and sent to a lab for testing. We were told he was no lactose intolerant.

But from my own googling, it seems theres another more accurate test which may be what they want her to have?? i'm only guessing here but thats a long time to fast for such a young baby...