Which brand of formula milk is good for stage 3

Yes, Similac can cause bad constipation. I too had it for my 5 years old previously when she's at your daughter's age. I change to Nan. I tried introduce Pediasure once awhile but it doesn't work. So I only give Nan and then normal food items for her.

I give my son Nan Optipro, best for him!!

so far I only gave similac and enfagrow

you cam try enfagrow