5 and a half mo eating formula for 6mo?

[Rumpleteaser]

The stage 2 formula has additional iron (larger baby needs more iron), Iron can cause constipation, you can offer additional water to try and counter act the constipation. Other than that it should be fine.
My MIL bought stage 2 formula when we visited from interstate when DS was 5.5 months, he was fine.

[butterfly_warrior]

We switched a week or so before Sam hit 6 months. We miscalculated how long the step one would last us and ran out and went straight to step 2.

I guess it's diferent for different types of formula, but Sam was actually pooping more regularly on step 2 than he was on step 1.

BW