My DS is 6.5mths old i tried him on follow on milk this week and he seems to be more grumpy and is waking much earlier in the mornings. He was on SMAwhite before i tried the SMA progress. Im concerned that these follw on milks state that at this age their iron deplets and they need these follow on milks to keep uptake of iron in their system. Im confused as to what to do?????