sorry don't mean to high jack but just got back from docs about lactose intolerance - only test offered was to test the poo.
Kcartyparty - symptoms exactly the same constipation/diahorrea - was initially vomiting but once cut out cows milk the vomiting stopped, but still get constipation/diahorrea from time to time although its much better, and complaints of tummy ache. DD on soya milk and dairy free products, but even dairy free chocolate gives her diahorrea.
did not know that soya protein and milk are similiar, so worried that the soya milk may also be a problem.
How did you know that your DS was allergic to the other things too - what tests did your GP do?
Also, if allergic to soya too - advice on alternatives would be very welcome.
Sunnyshine, was also told DD would grow out of it and to give small amounts from time to time, but the very next day (or if at breakfast, later that day) - tummy ache and diahorrea - which causes her distress when passing it. Been going on since before easter when first 'diagnonsed' but she was often sickly before that, was ok on breast milk but once switched to formulae the symptoms started.