DD2 is 7 weeks and has been on formula for 4 weeks. She has the S26 gold.

She hardly ever goes longer than 3 hrs and usually gets fussy at around 2.5 hrs.

Why doesnt she go longer? Should i look at changing her formula?
I know that she is due to move up to the 180ml but she has been ike this since we started her on it.

I will add that she does sleep between 7-9 hrs at night so it is just the day time we have issues with.