Soya is public enemy no 2. 50% of CMPI babies also react to soya. Next on the list are wheat and eggs. We cut out dairy and soya at the same time and then challenged them seperately and LO reacts to both. We haven't had issues with wheat or eggs. I think if we had that would have been my personal "switch to Neocate" trigger, I couldn't have cut both of those out longterm too.
There are two types of reactions to foods - foods that trigger reflux usually because they are acidic, and foods that trigger intolerances, chiefly because they are the usual allergen suspects, but also can be a long list for any indivdual baby. Have a look at http://www.littlerefluxers.co.uk/forum/topics/hypoallergenic-food-i... and http://www.littlerefluxers.co.uk/forum/topics/asw-traffic-light-sys...
The other possibility is that CMPI/intolerances are not an issue at all. We probably get it a bit out of proportion because so many of us with older babies have underlying intolerances (because the babies who don't get better quicker and leave the board). It's only 50% of refluxers that are CMPI, it's entirely possible that yours isn't.
Sorry I can't remember if you had any particular signs suggestive of intolerances?