I did read that some on here have tried part formula and cows milk. Do you think thats worth a shot? If so what would the ratio be?
Yup thats what I do to get them used to it. Every week I drop another scoop of powder and fill the rest with cows milk to what they normally have So at the moment, Eden is having 4 scoops of powder so it would take basically a month to be on full cows milk

And sorry - I assumed you meant toddler formula, not Step 2 (sorry for the assumption - my bad!!)