my 7m old ds has recently taken to periodic violent vomiting (not projectile). it started about a month ago, and the only pattern i noticed was that it happened after i had used cow's milk to mix his morning/evening cereal (ok after 6m i thought). we went back to using formula for this and he has been fine. encouraged by this, i made cauliflower cheese and he has been eating it with no ill effects. however, this evening i gave him quite a large helping of yoghurt (greek - might be relevant?) for the first time. he seemed to enjoy it, but was copiously sick about an hour later. i am wondering if he could be allergic to cow's milk or could it be that he is just not ready for "uncooked" dairy products? he doesn't have diarrhoea or any other symptoms.
any help or advice appreciated. thanks very much in advance.
PS - we had him checked out by a paediatrician after the first episode - couldn't find anything wrong.