I'm just wondering what sorts of tummy reactions are common when starting formula? (And how long they should last?) DS has been drinking a (whole!) 20mls of NAN1 at night as a comp feed (normally bf) and has become a bit 'blocked up'! I don't know whether to persist, or try a new formula - or is this normal?
(Also while we were away, I gave him S26 as it comes in little sachets, and he was VERY pongy! Discovering a whole new world!! Ha ha!)