My dd is 5 1/2 months and has had to date no dairy based food at all. I am milk allergic and so am paranoid that she will be too. Am getting to stage of needing to introduce cereal and would be much more convenient to use formula than keep expressing for this. What signs should I look for to see if she is allergic? Is there any way of finding out before I try? dr was v unhelpful and said should just try? I have a virtually dairy free diet myself so she won't have had much in breastmilk. My mum can't explain clearly to me what signs there were other than blue poo, as took drs 6 months to admit might be an allergy by which times things were pretty dramatic!!!!