hi there , I mix both stage 2 and 1 so basically if using 3 scoop of milk, I slowly introduce with 1 scoop of stage 2 and 2 scoop of stage 1 then if he or she is fine, then one or two weeks I will change to 2 scoop of stage 2 and 1 scoop of stage 1 .. then slowly transit totally to stage 2. at same time after 6 mo he or she can drink water so will let him or her drink Abit more water. hope it helps
Kaisah Rodzi