I would have thought you can check for a reaction by eating soy yourself, if she is exclusively BF? Mind you, there is soy in so much that we eat, she is probably been exposed all the time. Has she had troubles with YOU eating dairy? Or has it only been once you've introduced it to HER diet? Is that what they're concerned about with the soy? Do you have to do that challenge soon?

Sorry, I've taken this way off track!

You have my sympathies, it is very hard trying to work out what they can and can't have. In some ways it gets easier, but it's always THERE, you know? I'm going nuts just starting to introduce solids to DS2!