I have a 4 month old and I'm wanting to start slowly weaning him off the breast over the next 2 months. So I have tried s26 gold and now NAN pro gold and he won't take either. He may get the slightest amount and from 5 minutes to an hour or 2 he has a projectile vomit, never does this on the breast he also has silent reflux which he is medicated for. He has no issue with bottles as I express daily to top up in the evenings.
So do you think he may have a allergy to the milk protein or coincidence he's only has the formula 3 times?